Violent extremism in USA committed by leftists

Some vital points and info are provided here about how it's left-wing sources that're responsible for the surge of violence recently in the USA. One of the most notorious of those had to be what occurred at the Pennsynvania governor's residence a few months ago:

An arsonist set Democratic Pennsylvania Gov. Josh Shapiro’s home on fire with his family inside on Passover night, ultimately harming no one. Authorities pinned the crime on a man who allegedly admitted to targeting the pro-Israel governor “for Palestine” and had left-wing memorabilia in his own home.

Despite this, Shapiro, regrettably enough, gave a monetary grant to an anti-semitic Muslim mosque. How does that help improve the situation? It doesn't at all. That's got to be one of the worst things about this whole sad affair.