I do not believe our Mc is doing anything bad. To an extent he is just sending them to hell, what hell does is foreign to him. For all he knows, hell could be a place that gives slight punishes and reprimands people until they fix their ways. There is no justification to send our Mc to hell afterwards too as long as he continues to do good deeds along with his "greater God deeds".
If believe otherwise then you have to accept that Judge, jury, court, executioner, police aka the whole Judiciary and Executive department of every country is evil. And if you think that you are not a sociopath or edgy, you are just retarded.