If you ever played CoD it's not that different honestly, being in war and supposedly "on the good side", doesn't make killing hundreds that much better morally. Same with GTA, the main characters aren't mass murderers sure, they are only professional killers, drug dealers and thieves, they shoot people with no remorse, do any kind of illegal shit and last but not least torture: much better.
CoD and GTA have different, less dark, premises, but the end result is the same: you kill tons of people in a graphic way. They just disguise it better, so you don't end up hating yourself or feeling repulsion for it (still "no russian" and the torture scene from GTA V exist), it's natural to have different reactions to Hatred, GTA and CoD, I dunno about saying one is more toxic than the other though. At the core there's unnecessary violence, just presented in different ways.