I'm saying that IRA terrorism arose solely as a response to British tyranny. Islamic terrorism has no single, identifiable catalyst, however. There is no purpose, AFAICT, to compare the two.
This is a cartoon version of Irish/British history as much as it is a cartoon history of Islamic terrorism.
The victims of the IRA conflict have been by and large Irish-sorry, but the fact that the IRA claims that all protestants in Northern Ireland are "british occupiers" does not make it so. Just like Bin Laden's claim that America has "murdered millions of Muslims, justifying attacks on Americans everywhere" (that is literally what Bin Laden claims) does not make it so.