You can't make a religious argument to people who don't share your religion, so they're stuck with harassment and bald-faced lies. Even non-Israelis who agree with them on everything end up with a bad taste in their mouth after reading or listening to it.

They don't have any practice making a secular argument about the Palestinian situation, how could they? They fall back to assuring people that Israel is a friend to the US, that Israel is a democracy (a ton of its inhabitants are forced to live in ghettos and refugee camps), that Israel loves gay people (Israel doesn't have gay marriage, or even secular marriage except by treaty), and the worst: "Why don't you give America back to the Indians?"

Russian propaganda is bad, but it's also lazy: it gets them nothing and they don't put a lot of effort into it. Israel is trying as hard as it can. To not ethnically cleanse Israel leaves a population that Europe tried its best to exterminate drifting the stormy seas of having to compromise with their neighbors. This is a population whose neighbors once built factories in order to slaughter them more efficiently.