It’s also worth noting that their policy WAS originally raising humans underground, but it changed massively AFTER their prince got mercilessly slaughtered for taking their adoptive sibling’s corpse out of the barrier to be buried by their own species.

Adults murdered my son so I must slaughter unrelated children. I will also not use my power upon the death of the first child to go and collect the other souls from more deserving people. Instead I will sit around waiting, condemning the first 7 children who show up to death. Nor will I decide to stay underground and let the children go if that was my goal in the first place.

Even in context Asgore is objectively evil. If Asgore went out in anger and slaughtered 6 humans in retaliation then that’d be wrong but still understandable. The comparison to the IRA is absolutely shit because they never decided to target unrelated children of British people at the expense of their own goals. If the IRA had a choose between bombing a daycare center or Margaret Thatcher then they’d be evil if they decided to bomb the daycare.