Even if we agree and that's true. Israel assassinated their political leader in Iran.This guy actually murdered and tortured Palestinians. He went to prison for some of his crimes. He was not a hero and I'm sure a lot of non hamas supporting Palestinians are glad he is gone. He was more akin to a mafia leader than a political leader.
The guy they were negotiating with to free the hostages. How exactly does that help them or the hostages?
How does killing Sinwar guarantee the hostages freedom? So either israel knows they're dead and won't say so or they don't care if they die.