You say that as if they're a rival military force. You say that as if Hamas hasn't repeatedly attacked Israeli soldiers on the only scale they can manage, single digits at a time, only to have the Israeli government retaliate against civilian populations from a distance in far larger numbers. Hamas cannot oppose the enemy actively oppressing their people on symmetrical terms. They only have targets of opportunity.

Israel, on the other hand, can and do unload on civilians regularly, the global media just doesn't consider those civilian deaths to be newsworthy.