However, could it be that they are making God into thier own douchebag image? Could it also be we are often dealing with semi-literate people, biblically and emotionally? So it would be no shock to see them twist stuff like the Bible into horrible things.
Note at a lot of churches they don't get deep into Bible, and what they do choose to read is interpreted by a pastor who often has a political motivation. Look at the Roman Catholic church of old where peasants could not read the Bible at all.
In the US at least, if you go into more educated circles, you find the church people are more mellowed out and reasonable. However, if you choose to go to some backwoods place you might see Pentecostals or the KKK etc..