I'm confused. Are Feiglin, Ben-Gvir, and Smotrich not Israeli?
Him quoting Hitler isn't even the main issue in this case (to me), it's really what he's using the quote to justify, which is the expulsion of Palestinians from Palestine/ Gaza, which is, as the article demonstrates, a much more broadly-held viewpoint among Israelis, including ones who unarguably do have a lot of political power.
Lastly, if there are not a lot of public quotes condemning this coming out of Israel, for them to quote, isn't that itself kind of a problem?