While your points are valid, the comparison is not. EU has Hamas designated as a terrorist organization, so in comparison to that the actions are the same as with ISIS or Al-Qaida.
And EU did callout Israel for breaking international law, though it's very unlikely they will take any other actions apart from calling them out.
I think the two terms are mutually exclusive. Ukrainian military forces arent terrorists for fighting back against russian military occupation, even when attacking on Russian land it's self defense against the occupation. Gaza is militarily occupied by Israel.
They are not mutually exclusive in any way, shape or form. Terrorism and terrorist are descriptors, not moral judgments. Nelson Mandela was a terrorist and a freedom fighter, for instance.
Terrorist is a moral judgment which is why you took the time to come here and tell me they are, and why the EU is trying to outlaw speech about them. Military response to military occupation of your country is not terrorism.
All of the attacks have had a common trait, they are all immediately on the Gaza border. Israel has held a military grip on Gazas borders to a degree that is a humanitarian crisis.