Here's what will happen once the first synagogue burns:
The Alt-Right will say that:
1. It was a horrible tragedy and a false-flag, orchestrated by Jews/Alt-Left/Commies/Liberals to make them look bad.
2. But if it hypothetically were not a false-flag, it would hypothetically be an act of self-defense against the Jews and thereby justified. You know, hypothetically speaking. Because it totally was a false-flag and tragedy. And justified.
Then unsourced rumors and unsourced anecdotes will creep up how this totally was a false-flag.
The media, the Democrats and the Republicans (sans Trump's White House) will be outraged.
Trump will speak of the tragedy and of the lives lost. He will call on the country to come together in love and peace. He will blame the synagogue-burning on a few bad apples.
Outrage over Trump's statements.
Outrage-fatigue.
No consequences for Trump or the Republicans whatsoever and with the excuse of "both sides are violent" everything goes back to the new normal of monthly white domestic terrorism.