To clarify, is it still a terrorist regime when it's not actually targeting civilians, but only by coincidence civilians and civilian infrastructure are close to the regime's military targets?
This is rather clearly described in the laws of war.
If militants hides behind civilians or use civilians as shields for military infrastructure, the lives of the civilians is their responsibility.
This might seem counterintuitive at first but is perfectly obvious once you stop and think:
If it was legal to use civilians as human shields and it would shield your military infrastructure everyone would do it.
Because the laws of the war is so clear about it nobody does it except Hamas and they only do it because they know western media and commentators will blame Israel despite international laws being very very clear in this matter.
Everyone does it. We just call it espionage. That said, when a Western espionage mission goes awry and it results in collateral damage, the government doing the fuckery is properly blamed.
I'm talking about Hamas literally
a) putting missile ramps and ammo depots in busy areas
b) preventing civilians from leaving after Israel has dropped leaflets, called phones in the area and dropped noise bombs
I don't see how the west does anything similar.
[1] https://en.wikipedia.org/wiki/Merchant_raider
[2] https://www.scientificamerican.com/article/how-cia-fake-vacc...
https://www.timesofisrael.com/israel-in-talks-with-congo-and...
If it is actual indiscriminate bombing or targeting of civilian targets not used in war crimes, human shields, storing military equipment & munitions, command& control, etc., then yes.