Well, um, you see, Hamas video'd themselves brutally murdering about 1200 people, including about 380 young adults at a rave, including pretty significant amounts of sexual violence and parading corpses or near dead people around Palestine.

They took around 250 people hostage.

Hundreds of thousands of Israeli people were refusing to serve in the IDF because of Palestinian oppression on October 6th. After the attacks, IDF had more volunteers than they could equip.