Sorry, I was wrong. They want to "obliterate" the Jews, not expel them. When talking about genocide, it's important to specify the correct flavor.

https://avalon.law.yale.edu/20th_century/hamas.asp

Regardless, they have multiple times rejected concessions and compromises that would have enabled them to have an independent democratic nation. If that's truly what they wanted, why would they always pass on the opportunity to get it without bloodshed?