God gave us free will. Those horrible things that happen to people are done at the hand of other humans. There's a part in the bible where people want a leader because other people have leaders so God appointed the position sure, that is our choice. Hitler and Stalin had their power because humans wanted them to.. humans put them there.. humans supported those and their evil. The reason he says to obey is because it's better than doing something stupid and immoral and losing your soul. There's lots of parts that also say this life is nothing compared to what comes next, so dealing with the pain and suffering is minuscule compared to dealing with it eternally. :)