And went up the hill with Jill?

1. He made a shady deal with a questionable salesman for some "magic" beans. He is underage and doesn't ask for permission from his legal custodians/parents to sell the family cow.
2. He risks life and limb to climb the bean stalk without wearing appropriate safety equipment or proper harnessing/anchoring.
3. He steals a golden goose from the Giant. I understand that the Giant is a cannibal, but maybe that's just the way where he lives
4. He causes the death of the Giant

Jack isn't the only fairy tale "hero" that justifies stealing and killing for the betterment of their family or for personal gain.

He was a lazy socialist. Instead of getting a good education and working hard, he killed someone for a goose that lays golden eggs, so he could kick back and relax while the goose did all the work.

He was just misunderstood.

I'm thinking so. The giant, like certain political candidates, apparently went around sniffing children. The giant got what he deserved.