What you're refering to as Israel, is in fact, occupied Palestine, or as I've recently taken to calling it, US occupied Palestine. Israel is not an country unto itself, but rather another free real estate component of a fully functioning apartheid system made useful by the imperial corelibs, shell mortars and vital system disruptance comprising a full genocide as defined by the UN.
Technically it was Isreal first so... That's like if the native Americans retook the US and then the US attacked the native Americans. You would be on the side of the US and the native Americans would be the occupiers.