[pbiggar]

In actual fact, it's pure tribalism. When you are born into one tribe, you adopt the cultural aspects of that tribe. Those include the religious denomination and political beliefs, including hating the other tribe.

In Northern Ireland, religion is correlated to political belief because the two major tribes are divided along those lines. Nobody who believes Northern Ireland should be part of the UK does it because of their interpretation of the Eucharist.

And you could say exactly the same about Islamic terrorists too.