1.      What examples from the song are ironic?

“Great Nations of Europe”

“He had them torn apart by dogs on religious grounds they say
the great nations of Europe were quite holy in their way.”

This song has quite a bit of irony in it. I actually found the title to be somewhat ironic, since he calls them great even though he depicts them as barbaric. Irony is basically using certain words to convey the opposite about what those words mean, so you can see how calling them “Great” or “Religious” is very contradictory.

2.      What examples are not Ironic?

“There's pictures in a museum, some lines written in a book
but you won't find a live one, no matter where you look.”

“Destroying everything in its path from sea to shining sea
like the great nations of Europe in the 16th century.”

These  examples are not ironic because in the present we know these things to be true. He is describing actual events and even though the tone is lighter it is still very literal.