The fact is that the vast majority of terrorist attacks in the second half of the 20th century, and not a few before then as well, have been by Muslims. There was an outburst of Irish Republican Army attacks for a couple of decades, and the odd left wing wacko (Red Army Faction, Bader-Mienhoff, etc) in the 1970s, but for the Most part the big attacks have been by Muslims. Shift to the '90s and '00s and about the only non-Muslim terror attacks would be the Japanese Cult that put the Sarin into the Subway system. Oh and of course the single attack by a few Neo Nazi weirdos in Oklahoma City, and even that one *may* have a Muzzie connection, as did some of the IRA's operations. So '24' just reflects reality.
Good. Now I'll be watching 24 every week.