Duckman, sv, you seem to think that the "issues" in Northern Ireland are not related to christianity.
Ever heard of the "no true scotsman" fallacy?
I assume that (using your definition of "christianity" or "religion") the crusades, the inquisition, the pogroms and all those other naughty historical facts must have been just the result of bad PR, and nothing to do with religion either?
I grew up in NI, in a pretty ugly area. I used to think (probably like you?) that in this sort of tribalism, religion must just be a bystander or an excuse. But experience has shown me that the divide between "the bands" and "the boys" and the church groups they belong to is a slim to non existent one, and that religion is the main way in which they define themselves (and "the other") on both sides.
Religion is completely central to the conflict.
While you may think that christianity precludes violence / ethnic cleansing and hatred, it seems that some members of sectarian terrorist groups have a broader knowledge of the behaviour of religious groups through history than you do.
PS.. Where I grew up the main place used to identify potential recruits for "loyalist" paramilitary organisations was … the local band.