Well let's see... the IRA/English's battle over Northern Ireland (largely drawn across Catholic/Protestant religious lines) cease fire was just over 20 years ago. And the final peace accord was only 17 years ago. That marked the end of 30 years of assassinations, murders, bombings, and attacks all of which were surrounded by religious fervor.
I realise that's the narrative that many people believe around the world, but it's also a complete misunderstanding of Irish history. The warring parties *were* divided across religious lines, but that was an historical accident. English colonists happened to be protestant, native Irish happened to be Catholic. They were fighting over many things - land, self-determination, equal rights, republicanism, loyalism, etc. - but religion was *not* one of them. To the best of my knowledge (I lived in Ireland during the troubles, as I do now) no-one was killed during the troubles over a theological difference of opinion. Their religious identities became convenient labels, but nobody was under any illusion that the conflict was actually about religion.