The popular opinion in this thread is that we should never part ways with anyone in this life. That we should consider all people, no matter how problematic, as possible converts and spend as much time and energy as it takes to reach and convert them.
That is not simple ignorance, it is intentional deception.
As for spending time and energy as it takes to reach someone, it is one thing when you are in a set surroundings that you cannot get out of, but there is a limit to how we utilize our time and energy in so doing in reaching someone to convert them because of this below.
Matthew 7:6 Give not that which is holy unto the dogs, neither cast ye your pearls before swine, lest they trample them under their feet, and turn again and rend you. 7 Ask, and it shall be given you; seek, and ye shall find; knock, and it shall be opened unto you: 8 For every one that asketh receiveth; and he that seeketh findeth; and to him that knocketh it shall be opened.
And when there is a professing believer or church that is engaging in iniquity and will not depart from, there is this guideline below.
Matthew 18:10 Take heed that ye despise not one of these little ones; for I say unto you, That in heaven their angels do always behold the face of my Father which is in heaven. 11 For the Son of man is come to save that which was lost. 12 How think ye? if a man have an hundred sheep, and one of them be gone astray, doth he not leave the ninety and nine, and goeth into the mountains, and seeketh that which is gone astray? 13 And if so be that he find it, verily I say unto you, he rejoiceth more of that sheep, than of the ninety and nine which went not astray. 14 Even so it is not the will of your Father which is in heaven, that one of these little ones should perish. 15 Moreover if thy brother shall trespass against thee, go and tell him his fault between thee and him alone: if he shall hear thee, thou hast gained thy brother. 16 But if he will not hear thee, then take with thee one or two more, that in the mouth of two or three witnesses every word may be established. 17 And if he shall neglect to hear them, tell it unto the church: but if he neglect to hear the church, let him be unto thee as an heathen man and a publican.
Titus 3:9 But avoid foolish questions, and genealogies, and contentions, and strivings about the law; for they are unprofitable and vain. 10 A man that is an heretick after the first and second admonition reject; 11 Knowing that he that is such is subverted, and sinneth, being condemned of himself.
2 Thessalonians 3:1Finally, brethren, pray for us, that the word of the Lord may have free course, and be glorified, even as it is with you: 2 And that we may be delivered from unreasonable and wicked men: for all men have not faith. 3 But the Lord is faithful, who shall stablish you, and keep you from evil. 4 And we have confidence in the Lord touching you, that ye both do and will do the things which we command you. 5 And the Lord direct your hearts into the love of God, and into the patient waiting for Christ. 6 Now we command you, brethren, in the name of our Lord Jesus Christ, that ye withdraw yourselves from every brother that walketh disorderly, and not after the tradition which he received of us. 7 For yourselves know how ye ought to follow us: for we behaved not ourselves disorderly among you;.......
14 And if any man obey not our word by this epistle, note that man, and have no company with him, that he may be ashamed. 15 Yet count him not as an enemy, but admonish him as a brother.
And although the Lord will help us to see when to withdraw and to help us to withdraw to admonish a professing believer, there are some environment He may have put us in, that cannot be the same for withdrawing from when it is the work place or the home since there, by the grace of God, we can serve Him as a light in a dark place.
Here are two scriptural references that cites the work place where a believer may suffer being defrauded and being victimized by a froward employer.
James 5:1Go to now, ye rich men, weep and howl for your miseries that shall come upon you. 2 Your riches are corrupted, and your garments are motheaten. 3 Your gold and silver is cankered; and the rust of them shall be a witness against you, and shall eat your flesh as it were fire. Ye have heaped treasure together for the last days. 4 Behold, the hire of the labourers who have reaped down your fields, which is of you kept back by fraud, crieth: and the cries of them which have reaped are entered into the ears of the Lord of sabaoth. 5 Ye have lived in pleasure on the earth, and been wanton; ye have nourished your hearts, as in a day of slaughter. 6 Ye have condemned and killed the just; and he doth not resist you.
7 Be patient therefore, brethren, unto the coming of the Lord. Behold, the husbandman waiteth for the precious fruit of the earth, and hath long patience for it, until he receive the early and latter rain. 8 Be ye also patient; stablish your hearts: for the coming of the Lord draweth nigh. 9 Grudge not one against another, brethren, lest ye be condemned: behold, the judge standeth before the door. 10 Take, my brethren, the prophets, who have spoken in the name of the Lord, for an example of suffering affliction, and of patience. 11 Behold, we count them happy which endure. Ye have heard of the patience of Job, and have seen the end of the Lord; that the Lord is very pitiful, and of tender mercy.
1 Peter 2:18 Servants, be subject to your masters with all fear; not only to the good and gentle, but also to the froward. 19 For this is thankworthy, if a man for conscience toward God endure grief, suffering wrongfully. 20 For what glory is it, if, when ye be buffeted for your faults, ye shall take it patiently? but if, when ye do well, and suffer for it, ye take it patiently, this is acceptable with God. 21 For even hereunto were ye called: because Christ also suffered for us, leaving us an example, that ye should follow his steps: 22 Who did no sin, neither was guile found in his mouth: 23 Who, when he was reviled, reviled not again; when he suffered, he threatened not; but committed himself to him that judgeth righteously: 24 Who his own self bare our sins in his own body on the tree, that we, being dead to sins, should live unto righteousness: by whose stripes ye were healed. 25 For ye were as sheep going astray; but are now returned unto the Shepherd and Bishop of your souls.
So this topic should not be about removing yourself from toxic people, but rather trusting the Lord Jesus Christ as your Good Shepherd & Friend to help you to follow Him in how to be a light in a dark world and when to withdraw with His help.