Although, I cannot speak in terms of Jewishness why a Jew would vote for their destructor, I can state why a liberal would do so.
Liberals are religiously minded people, but they don’t want the obligations that come with their religious mindset. They want a society they like, but they don’t want the morality that comes with making nice societies. JINO’s are like this.
I’ve come to realize that many Jews resent the West, both for its oppression of Judaism but also its ability to create heaven on earth when they are the chosen people and supposed lights to the world. So, they work to destroy the West through leftist and they don’t consider how it will destroy them as well. When I say that, I am focusing on Jewish leftists and not Torah observant Jews.
The west has not oppressed Judaism until recently. At least not the most prosperous countries, like France, Netherlands, England, Italy. Germany didn’t either, with the exception of the Nazi era.
Very good summation
“When I say that, I am focusing on Jewish leftists and not Torah observant Jews.”
As a Torah observant Jew myself living in Israel — THANK YOU for understanding the reality.