Many people in the west enjoy it too. Lots of Europeans and Americans don't like Muslims (or even Jews or just people who don't look 'white'), and they like turning on the news to find out how many have been killed each day because it wouldn't be acceptable to carry out in their own countries, especially in the era of DEI.

There's the two-wrongs-make-a-right atonement for the holocaust aspect on the German side and the promise of the rapture for Americans also.

Maybe most importantly willingness to show eager support for something that may seem 'bad' such as genocide functions as a shibboleth to display allegiance to one's political party and society because ultimately what's happening in the news has no deep significance for most westerners beyond that of a football match. Showing you're not an anti-semite is the most important thing one can do, and there's no better way to do that than support whatever the current Israeli government feels like doing (perhaps sparking a large regional conflict) and rounding up any Jewish people who object on charges of being race traitors.