Yea I feel like in that case they shouldn’t call themselves Christian for the simple fact they do that but I also don’t understand why they say when we die we’re going to go to Heaven I just feel like that defeats the whole purpose on why God created the earth. But back to the first part even if they still want to be considered a Christian they need to repent bc God doesn’t like when we kill/ harm each other anyway. So just doing that yea it’s best to repent and fix your relationship with God