Israeli administration of Gaza preceded Hamas' foundation. Its administration of the West Bank is characterized by regular IDF incursions into its settlements where homes are demolished, residents are kidnapped and tortured without cause, and armed, escorted settlers are let loose to assault the same residents and loot their businesses. Hamas' founders were all born either in settlements that have been forcefully depopulated by Israel or in refugee camps that still exist today because they keep getting filled up by people who lived in those settlements. I imagine most people would be miffed by this set of circumstances.

Israel is trying to destroy Gaza and its people - look at any recent photos. There is some equivalence in the aims, and one group has begun to get close - Israel.

It’s time for aggressive outside intervention.

The charter for Israel still calls for the total destruction of Palestine...

actually old (original) charter of hamas was never removed or replaced. it's still there.