Yeah it's a given he frowns on casual murder and torture considering he served in a war with a lot of that happening to innocent people and then woke up to some Norse god doing it all over again..... then SHIELD trying to get him to be cool with it. Then HYDRA within SHIELD trying to recapture their glory days.

Basically all his stories make it clear why he would not be okay with that whether it's one person or a whole group haha. That's just how he rolls. It doesn't matter if it's Loki, HYDRA, or a woman he's on a team with.