Hamas are the ruling party of Gaza, a region occupied by Israelis and not permitted elections for over a decade. By international law, they have every right to resist occupation by all necessary means. I have plenty of criticisms of Hamas, but they are not the primary oppressor in Gaza. That is, obviously, reserved for the occupiers that prevent Palestinians from having food and clean water. From having the right of return. For being permanent refugees.
If Palestine falls, the people who supported their disposession will hold land acknowledgements for them. They refuse to oppose actual genocidal and apartheid regimes. They will only feel guilty after the systems they support have finished the deed. This is the outcome produced by comlicity in oppression and disposession.