Why are so many people saying "Free Palestine!" after the Hamas attack? Why weren't they saying that prior to the Hamas attack? Aren't they just responding to a Call of Action by a terrorist group?

After Hamas attacked Israel, it seems like millions of people jumped onto this as a rallying cry, instead of considering it to be a terrorist attack.
Where were all these “Free Palestine” activists before the Hamas attack?

I am non-ideological, except for the ideology of sticking to facts.
I got no horse in the race.

I have had major criticisms of Israel all along. But when Israeli civilians (including a bunch of neo-hippies at a rave) are directly targeted and killed…. isn’t it the wrong time to suddenly say “Free Palestine!”. Talk about rewarding evil.