That is a form of liberal Zionism to say that anything settlers do is decisive to the struggle. Anti-imperialism has always been a struggle spearheaded by the oppressed themselves not their oppressors. Not to mention that these Israelis don't actually feel remorse. They, much like other "anti-war" settlers eg USAmerican vets against the US invasion of Vietnam, are upset that imperialism has negative side effects for them. They do not care about the colonised.

It is actually what they are saying. A gestapo that feels bad is "the best ally". Fuck off, the best ally isn't a genocidal colonizer, it is the Palestinian resistance and those who stand with it every damn day.

That is exactly what they're saying, and it's horseshit. If they actually had regrets and wanted to make amends they'd take as many of their Nazi buddies with them as possible.