But terrorism is about tactics: indiscriminate killing/maiming of civilians to inspire terror in a population. Lots of groups, including governments, have used these tactics. And they should be called out when they're used, no matter who by. Hamas and Israel have both used terror tactics at points in this war, and they should both be called out for it. But calling one group "terrorists" and the other group "just trying to protect their country" is just pure propaganda.
I'm from the UK and noticed similar labelling in the Troubles. The Provisional IRA were a terrorist group, but when the British Army massacred a load of civilians, they didn't become a terrorist group.