The "all criticism of Israel" claim is not used by a lot of pro-Israel persons, which Republicans usually fall under. I'd dare say it's minuscule, with the grand majority recognizing that not all criticism of Israel is anti-Semitic. Most pro-Israel persons have their own criticisms of Israel even.
I agree that the Netanyahu government isn't that great; however, to say that Israel will descend to fascism is too much. Perhaps the ideology of seeds isn't wrong, but I would emphasize that a lot of those won't germinate and grow. Israeli politics are a strange beast, and honestly I'd think with where Israelis are going that Bibi shouldn't bank on his government lasting after he leaves. Honestly, most Israelis really don't like Bibi that much, and if their system was a bit more straightforward he wouldn't have been the one in office.