You can't remember when IRA made threats? Open up a history book, you should find quite some examples. The IRA is specifically dedicated to the northen Ireland conflict, but has conducted terrorist attacks in mainland UK.
By going after terrorism not just radical islamist terrorism, we should be going after terrorism in all of its variants. Or are we just dedicated to hunting islamic terrorists? Or perhaps just terrorists with interests in harming the USA?

For then its not a "global war" on terror (...ism), its a US "war" on radical islamic terror (...ism).

Or just the oil...