A lot of the commenters seem like they would have denounced the french resistance as being terrorists.
I don't think people really understand why "terrorism" and guerilla tactics happen - they come about when there's massive power imbalances.
No government is perfect, leadership and political factionalism gets particularly bad during war, as do the various inhumanities and war crimes. Usually in the hands of the greater power dehumanization is involved in the desire to exterminate, in the lesser power a seething revenge and fearless demand for the right to life to the point of wanting to exterminate the enemy totally.
It is very much true that "one man's freedom fighter is another's terrorist"....
...but in the end we have humans killing humans, and that's the real problem. A problem which is currently serving the US military industrial complex which Israel is contractualy obliged to preference, and much of the US funding for Israel is spent back into that industry.
The war pigs get fat on human blood, and they don't really care whose it is, as long as there's a lot of it. Meanwhile Israel can be seen as aligning with US geopolitical interests, seeking the destabilization of Russias allies and perhaps even annexing oil resources. This is modern rationale for mass killings and war.