I don't think that this is true.
The shit is so insidious, subtle to start with that it's easy to get drawn in. There is no sudden change, it's a drip effect drawing you in and turning reason on it's head. It feels as though it's everywhere at the moment, the difference is that those who were drawn in by subtle means are trying to break the rest of down with a hammer- they are evangelical about it and preach it everywhere. They can't comprehend that the whole world doesn't think like them, they think you are odd if you don't and need to be brought into the fold.
This makes some people question themselves and start to parrot what they hear so they fit with the crowd.
Results like Cardiff show we are still a civilised society rejecting the rhetoric of hate.