Israel is not a Christian nation, it is Jewish.
There is no such thing as a Christian nations as it pervades most nations (maybe all, though in some converts to Christianity would be in great peril) and no nation is without a multitude of religions within it.
Which brings us once again close to the topic of the OP. The predominant view in my understanding, of premillennialism is that Satan is bound now and will be released in the "Great Tribulation." In amillennialism (my perspective of it) the Scripture says he is bound from deceiving the nations. Not that he is completely bound---and evidence shows he is not.
So when he is released for a short time, he is released to deceive the nations. WHat might that mean?
If we look at the fact that even nations that consider Christianity the devil himself, and forbid preaching the gospel, even kill those caught doing so, there are still pockets within those nations where the gospel is preached and Bibles distributed. This is done in direct obedience to Jesus' command that it should be preached to all nations, by very, very, brave Christians. Satan is bound from stopping it.
When he is unbound I believe we will see a worldwide persecution of the church by governments. And those days will be cut short for the sake of the elect.