We had this debate when the last season aired, it's probably only a couple pages back, lol, so I don't feel like we need to repeat everything. My issue has always been, and still is, how Rimuru just appears at the resting soldiers' place, and insta-murders all of them. And while he does, he specifically cares about there being at least 100k, so he can revive his friends. This wasn't a defensive measure, and no, it's not just to murder soldiers who killed your friends in an ongoing war, these soldiers carried out orders. The just thing to do would have been for Rimuru to kill the leaders of the army, and then anyone that still opposed him.

I have zero sympathy for Russia atm, but would you guys think it'd be just if some just snipped their fingers and ALL of Russia's soldiers dropped dead? That's not how war works. You fight, until one side retreats. Genocide is not the way of any regular war, that's an extra step in the direction of "fucked up". And Rimuru took that extra step. He's evil. "B-but he revived his friends who were killed by those soldiers!!1" - they died in battle with an enemy army, they weren't killed by evil people, and certainly not every soldier in the army was happy with what happened. But Rimuru made no distinction here (or the author took the easy route and wanted us to believe that all those soldiers were scumbags).

And just for the record: Rimuru DID have the power to solve this situation without murdering 100k+ people. There was no strategic need for this, it was all his selfish desire to bring back his friends. ThaT's why he's evil and why he's like Overlord, only he (or the way the anime presents him) pretends to be "good".