Perhaps not, but do you not think they feel emboldened by the anti-Israel/anti-Zionist sentiment that's apparent world wide?
It's more than that though. You say Hamas committed an atrocity but it certainly seems to be ignored/forgotten by those campus protestors. Why are they calling for only Israel to stop, and not also for Hamas to release the hostages/surrender. You say Hamas doesn't care, but it's supporters in Iran and Qatar might.