specifically, THREATS of violence are likely spurred by Trumpism, in my opinion
As for scientific support, many many studies (for example those tracked by the anti-defamation league) show a steep rise starting in about 2017 in anti-Semitic threats, anti-gay threats, anti-"woke" threats, etc.
You can try to think of other factors that suddenly changed in January 2017.
One example, 2017 saw the biggest rise ever in anti-Semitic violence.
This then remained steady (and crazy high) in subsequent years
Here's a recent NBC News report that discusses the rise in anti-Semitism since 2017