Same MO as always. If you’re not with Israel (the country) you are anti-Semitic, have forgotten about the Holocaust (which you should feel ashamed of letting happen), and support terrorism.
Though mostly I think these governments are just aligning with the wishes of the US, coupled with the knowledge that they can afford to be cavalier with the rights of citizens who might have attended, and... they want to avoid the complexity of policing this.
I think it's more ideological and about geopolitical power. Maintaining western hegemony in the M.E. requires Israel, and every western nation has dumped a ton of resources into building the nation so no one wants to have that be for nothing, even though Israel has become everything it claims to be against.
Israel will get a blank check as long as the Middle East itself is in turmoil. Bit of a perverse incentive, but it explains both the wests support for the genocidal regime in Israel and the behaviour of Israel itself.
Israel also has some of the most sophisticated intelligence capabilities on the planet. Consider that Ghislaine Maxwell has connections to Israeli intelligence. Having evidence of a bunch of politicians and powerful people having sex with children tends to create a certain element of influence.