Even in an extreme scenario where most of the hash rate is pro-censorship, there will still be a few pools which will not censor.
And in such a scenario, the pro-censorship majority can simply ignore any blocks which include transactions they dislike. Any blocks mined by the non-censoring pools can just be re-orged out of the chain at will.
As it turns out, bitcoin is
not censorship resistant. It simply isn't being censored right now.
If that happened I could see 2 things happening.
1) A fork war.
2)
BTC loosing all it's value and it not mattering who mined what anyway since nobody would be using it anymore.
No pool would really want to do that because they would probably see the same things and know that it would kill their business.
-Dave