Don

2Co 6:14  Do not be unequally yoked with unbelievers. For what partnership has righteousness with lawlessness? Or what fellowship has light with darkness?
2Co 6:15  What accord has Christ with Belial? Or what portion does a believer share with an unbeliever?
2Co 6:16  What agreement has the temple of God with idols? For we are the temple of the living God; as God said, “I will make my dwelling among them and walk among them, and I will be their God, and they shall be my people.
2Co 6:17  Therefore go out from their midst, and be separate from them, says the Lord, and touch no unclean thing; then I will welcome you,
2Co 6:18  and I will be a father to you, and you shall be sons and daughters to me, says the Lord Almighty.”

Here we see that there ARE those we are to separate from, namely unbelievers, just realize there is a limit beyond which you cannot go.

But the non-egals are losing and they know they are losing, so one response is to rachet up the rhetoric.  This is why they try to connect egal with liberalism; they say if you do not agree with us, the bogeyman will come and get you, where the bogeyman can be any number of things.  And if you really do believe that a bogeyman is coming, it only makes sense to warn others.