The only way Trump could have possibly fanned the flames was by being pro-Israel, which in turn, would have angered the anti-Semites even more than they were already.
But he himself didn't cause anti-Semitism to rise or get more violent.
The anti-Semites took it upon themselves to react the way they have.
Israel is a friend and an ally, and should be able to count on the United States for support.
Also, Obama does not even acknowledge the Abraham Accords, which went out the window the moment Biden stepped into the White House.