Why did and does God punish kill and exterminate his own followers for something they didn't do.?

1. Everyone has committed every sin, literally or in their heart. Thus, we deserve eternal damnation to hell, so simply dying, or a punishment isn't so bad. We will be punished, though. 2. Everyone has a time to go some time. 3. There are lots of people that claim to be his followers, that really are not. Please, anyone that can, add to this list.