In my view it's rare that anyone really 'simps for Hamas', they are the leading militant group in Gaza opposing the Israeli state though so if there are victories against IDF forces it's usually going to be under that umbrella, and praising a victory against IDF is not the same as praising past terror attacks. I've never heard anyone confused that they are communist. There are Marxist-Leninist groups in Palestine though, like the Popular Front for the Liberation of Palestine.