Purging

Kretos didn't really want to rule over all the demons but this was a necessary step for future battles he wished to have. If he was going to do it, he needed to make sure that he wouldn't be stabbed in the back. There might have been other ways to handle this situation, but this was the only way Kretos thought would be quick and effective. Also at the moment aside from killing he had no other skill.

The moment Kretos asked his question, the defiant demons and even those that already pledged loyalty to him were sweating buckets. They couldn't do anything but tremble as the dread was slowly encroaching their very souls. 

Many of those that wish to defy Kretos were feeling weak in the knee. Even the prideful Vampire Tribe couldn't say anything in front of Kretos's overpowering presence. As the ones who were defying Kretos were about to give up and take a knee one of them spoke.