Every religion (and ideology) has its various interpretations, from the stricter fundamentalists to the more liberal.

What interpretation someone chooses to accept tells you more about the person, than the religion. Every religion or ideology has its ayatollahs, its Grand Inquisitors, its Ideological Purists who make it their business to make sure everyone follows the strictest interpretation, and those who are more  easygoing, humane, accepting of human nature, etc.

That's why you can SEE the differences between the versions, between the Iranian Ayatollahs and the women who spy on their neighbours, gossiping about who is following the rules and who  isn't, and the ones trying to "cheat", etc.

So there are the ones attracted to the violent verses of a religion, and those who ignore them, or interpret them in a more figurative way.

What is scary is that we can't seem to be able to tell the difference.