I personally have no real problems with people setting fire to synagogue doors.
Also, I've got no real problem with Jews being made to feel fearful.
That said, I am not encouraging or condoning anything illegal, or would ever support direct physical harm.

Here's an Israeli settler encouraging and gleeful about attacks on Palestinian hospitals
She says "Soon with Gods help we will be settled on the land of Gaza."
http://www.youtube.com/shorts/O8p1Fx-0kWQ

When religious beliefs underlie a genocide, than I believe it's fair play for the places of worship to be attacked, though personally I would only support public protest and blockade of these places.

I believe Jews feeling fearful of reprisal attacks against them, would lead to pressure against the Israeli government to stop their slaughter of innocent people, and innocents feeling fearful is not the same as innocents murdered indefinitely without recourse.

It's no different than Israel attacking foreign countries and assassinating the leaders of countries that support Palestinians or a 2 state solution, and that includes this country.

I think Israel should face a full economic and trade embargo, and any country or place of business facilitating this genocide should have the light shone on them and face scrutiny.