I was talking to a friend about this and that with the rise of the internet and things like early new atheism (which has very weirdly become much more fash over time), stemmed from a deep rejection of everything evangelicals stand for.

We ended up agreeing that one of the big reasons the US is less terfy than the UK is that they don't associate their biggotry with anything religion related, and liberal american values are more than anything else an explicit rejection of anything evangelical related.