Then how can you make a sound argument?
I believe that how Lutherans treat communion is still an offense to God by believing His Presence is in the bread and the wine; thus committing idolatry. Luther may believe justification by faith alone but what we build on that foundation will be judged. Any works on that foundation that denies Him, is how and why He will deny them. One does not need to verbally deny Him, but by doing works of iniquity, they are denying Him.
Titus 1:16 They profess that they know God; but in works they deny him, being abominable, and disobedient, and unto every good work reprobate.
The Presbyterians are guilty of this iniquity as well. Communion service is NOT how we come into His Presence when He is in us and with us always.
2 Corinthians 13:5
Examine yourselves, whether ye be in the faith; prove your own selves.
Know ye not your own selves, how that Jesus Christ is in you, except ye be reprobates?
Reprobate as in disqualified to attend the Marriage Supper in Heaven, unless they repent of that iniquity before the Bridegroom comes.
Luke 13:24
Strive to enter in at the strait gate: for many, I say unto you, will seek to enter in, and shall not be able. 25 When once the master of the house is risen up, and hath shut to the door, and ye begin to stand without, and to knock at the door, saying, Lord, Lord, open unto us; and he shall answer and say unto you, I know you not whence ye are: 26 Then shall ye begin to say,
We have eaten and drunk in thy presence, and thou hast taught in our streets. 27 But he shall say, I tell you, I know you not whence ye are; depart from me, all ye workers of iniquity. 28 There shall be weeping and gnashing of teeth, when ye shall see Abraham, and Isaac, and Jacob, and all the prophets, in the kingdom of God, and you yourselves thrust out. 29 And they shall come from the east, and from the west, and from the north, and from the south, and shall sit down in the kingdom of God. 30 And, behold, there are last which shall be first, and there are first which shall be last.
Those unrepentant saints left behind are still saved but missed out on the wedding reception with the Bridegroom. This truth can be seen for how former believers that would deny Him verbally for why He would deny them and yet He still abides in them because He is faithful.
This is why we are to called even former believers and Christians that are workers of iniquity to go to Jesus for help to see the offense or the lies that turned them away from him to lean on Him for help to repent from so as to be received by Him as that vessel unto honor in His House which is that eternal glory that comes with our salvation in Christ Jesus.
2 Timothy 2:10 Therefore I endure all things for the elect's sakes, that they may also obtain the salvation which is in Christ Jesus with eternal glory. 11 It is a faithful saying: For if we be dead with him, we shall also live with him: 12 If we suffer, we shall also reign with him: if we deny him, he also will deny us: 13 If we believe not, yet he abideth faithful: he cannot deny himself.
18 Who concerning the truth have erred, saying that the resurrection is past already; and overthrow the faith of some.
19 Nevertheless the foundation of God standeth sure, having this seal, The Lord knoweth them that are his. And, let every one that nameth the name of Christ depart from iniquity.
20 But in a great house there are not only vessels of gold and of silver, but also of wood and of earth; and some to honour, and some to dishonour. 21 If a man therefore purge himself from these, he shall be a vessel unto honour, sanctified, and meet for the master's use, and prepared unto every good work.
So what happens when a saved believer does not depart from iniquity? They run the risk of being left behind to die, but their spirits will be with the Lord in Heaven to await for their resurrection after the great tribulation as vessels unto dishonor in His House.
1 Corinthians 3:10 According to the grace of God which is given unto me, as a wise masterbuilder, I have laid the foundation, and another buildeth thereon.
But let every man take heed how he buildeth thereupon. 11 For other foundation can no man lay than that is laid, which is Jesus Christ. 12 Now if any man build upon this foundation gold, silver, precious stones, wood, hay, stubble;
13 Every man's work shall be made manifest: for the day shall declare it, because it shall be revealed by fire; and the fire shall try every man's work of what sort it is. 14 If any man's work abide which he hath built thereupon, he shall receive a reward.
15 If any man's work shall be burned, he shall suffer loss: but he himself shall be saved; yet so as by fire. 16 Know ye not that ye are the temple of God, and that the Spirit of God dwelleth in you? 17 If any man defile the temple of God, him shall God destroy; for the temple of God is holy, which temple ye are.
2 Corinthians 5:7 (For we walk by faith, not by sight
8 We are confident, I say, and willing rather to be absent from the body, and to be present with the Lord. 9 Wherefore we labour, that, whether present or absent, we may be accepted of him.
10 For we must all appear before the judgment seat of Christ; that every one may receive the things done in his body, according to that he hath done, whether it be good or bad. 11 Knowing therefore the terror of the Lord, we persuade men; but we are made manifest unto God; and I trust also are made manifest in your consciences.
This is why Jesus is warning 5 of the 7 churches to repent and exhorting 2 of the 7 churches to hold fast or else. He acknowledges them as His and thus saved but not every saved believer will be found abiding in him for when the Bridegroom comes. Jesus will excommunicate those found in iniquity and thus left behind to die by that fire coming on the earth, & the remainder by the beast.
What God commanded the church to do metaphorically being the results on those excommunicated, it will be literal when God does it.
1 Corinthians 5:4 In the name of our Lord Jesus Christ, when ye are gathered together, and my spirit, with the power of our Lord Jesus Christ, 5 To deliver such an one unto Satan for the destruction of the flesh, that the spirit may be saved in the day of the Lord Jesus.
The Marriage Supper has to be held in sincerity and in truth for why Lutherans need to continue reforming how they do communion.
8 Therefore let us keep the feast, not with old leaven, neither with the leaven of malice and wickedness; but with the unleavened bread of sincerity and truth. 9 I wrote unto you in an epistle not to company with fornicators: 10 Yet not altogether with the fornicators of this world, or with the covetous, or extortioners, or with idolaters; for then must ye needs go out of the world. 11 But now I have written unto you not to keep company, if any man that is called a brother be a fornicator, or covetous, or an idolator, or a railer, or a drunkard, or an extortioner;
with such an one no not to eat.
That is how we are to hold communion in the fellowship of the church and so that is how the Marriage Supper will be held in Heaven.