As a secular Jew in Western Europe, I've distanced myself from my religious community due to its insistence on tying my identity to Israel. Where I live, it's less taboo to critique Israel than in the U.S., but still tricky.
Advocates of Israel's right-wing politics have blurred the line between criticizing Israel and anti-Semitism, an endeavor helped by actual anti-Semites. I've grown up with these supporters, but can't quite call them a "lobby" due to their loose organization and lesser influence here compared to the U.S.
Speaking out brings risks: being labeled a leftist extremist, clashing with fellow Jews, or unwittingly aiding anti-Semites. And that's if you are Jew.
This creates a pervasive, cautious silence that I imagine is even more stifling in countries with highly organized pro-Israel lobbying.