It’s a bit naive to think Western Europe hasn’t been under attack from the right wing at least as long as the US has. They’ve had wars over it that never really reached US shores, and it never really went away. All of the strategies that have been used in the US were piloted and honed in Europe – look up the activities there by Manafort, Stone, Bannon, etc. all the same names who have been implementing the shit you’re seeing in the US were active in Western and Eastern Europe years before this. It’s been going on there far longer.
It’s amazing to me that people in the US haven’t been paying attention to what’s gone on there and learning from their successes.