A colony of what empire exactly? Jews were a group of massacred refugees.
> massive support from the United States
There is no massive support from the United States actually, at least not monetary. There is military help that is needed because Israel's enemies want to destroy it, still to this day. And it's not that big compared to Israel's gdp (4 billion to 400 gdp = 1%) and is completely meaningless to the U.S budget. The other support is vetoing U.N decisions that constantly target Israel. Which is needed for the same reason the military aid is needed.
> Israel (the colonial ethnostate) should not exist
Should the U.S exist? Last I checked California used to be part of Mexico - why isn't it being returned to it's rightful owners? How about West Europe? Maybe it should be dismantled and have all it's assets transferred to Africa? I've never heard anyone say stuff like that but when it comes to Israel sure let's destroy the evil ethno state.