No. People like to portray some of these sectarian conflicts in religious terms. Insofar as religion's relevant, it's because it's been manipulated. The Tigers essentially invented the technique of suicide bombing. Up until about 2003, pre-Iraq war, most of the people who had been killed by suicide bombers had been killed by the Tigers not by Islamist suicide bombers. But the Tigers who did this were Hindus, atheists, or Christians. They were all pursuing the same technique.
So, no, there's a manipulation of religion in the conflict.