Christ-tan in cute and very corruptible.
And besides, Christians aren't gonna do shit. Do you honestly think /a/'s gonna give up lust or /v/ wrath? Not to mention all the unholy fetishes and interests they have? Christians won't do that shit cause they know if they'll be shit on by these communities like they were in the 90s.
If anything really, they'll try to say how christianity is wonderful and how it accepts you and your degenerate preferences. Remember, christianity was successful because it appealed to the lowest common denominator. The poor and the plebs. Even now, Pope Francis makes comments about how gay people and atheists shouldn't be discriminated against. You think he believes that shit? No, it's that the church is starting to lose it's hold on people and they need to once again appeal to the plebs. And it works, Vatican crowds are 4 times as large now.
The third option is just them staying relatively under the radar, the occasional autist saying "something something DEUS VULT" with no one really caring all that much.
Either they get hated again, they keep to themselves, or their doctrine gets castrated even further and becomes nothing more than a bunch of humanist bullshit. Win-win-win.