Have you noticed how keen some countries are to commemorate wars with other countries but are reluctant to talk about civil war?

I'm thinking especially about Spain and Ireland. At least in the former it was a clash of ideologies to some extent, but I've never understood the Irish one. As soon as they got rid of the common enemy they turned on each other. My reading of it is that the victorious side more or less adopted the policies of the defeated with the support of the Catholic Church.