Netanyahu picked a bad time to provoke Biden while the pro-Israel republicans have neutered by the antisemitic hard right.
Biden has pressure from his left to call for a ceasefire and little political upside to supporting Israel. Any other year, the Republicans would be howling about how Biden is soft on Terrorism, or weak on Israel, but the Krazy KauKus is standing on the throats of that kind of conservative.
Netanyahu's strategy of relying on support from Christian Nationalists while ignoring Jewish Americans may not have been wise.
That's the difference though. McConnell is old guard Republican. Far-right, but in a stodgy, slow kind of way that builds strategic alliances where needed. Trump's far right is utterly impulsive, guided by pure emotion, and completely unfettered in their hatred.