A quick question, which I can probably Google - Does Hamas aim to eradicate Jews or just reclaim Palestine from them?
If they didn't before, they certainly do now. Though they probably did all along. Buying time by weasel words, and waiting their moment. Diverting millions in financial help which might have helped the everyday situation of the Palestinians, into building tunnels under Gaza and into Israel in order to stage surprise attacks.
Israel's response, though predictable, has now probably incentivised thousands more Palestinians to join Hamas. Kill one Hamas activist, and ten rise up to take his place, so I've heard suggested.
I only hope the perceived divisions in outlook and allegiance between the Muslim peoples, especially the Arab ones, will be a sufficient deterrent to prevent this from escalating into a world-wide conflict.