Trump didn't do it all by himself. But, without him, the whole thing (literally, from 2015 on) never happens. It requires a really skilled demagogue for any kind of socio-political... movement... to be successful, or even have a chance at being successful.
The point is to never...ever... follow, support, or offer any allegiance to a demagogue. And, DJT has all the worst characteristics of the most dangerous kind of demagogue. Of course, in this case, it's much too late. Too many people, for far too long, have their own personal identities attached to him, now.