OFP is a game, and a game which is based on reality, but is not real.
Thus, anything really is acceptable, because that old addage of:
"Just because my son watches the A-Team, doesn't mean he's going to get an AK-47 and spray bullets wildly into the room, failing to hit his target whom is only 4ft away."
Or in other words, it doesn't affect how someone relates to real life, they aren't going to do it, or shouldn't.
I see no problems with this, and to be honest, in todays society, there are far greater things to show concern about, than a game having Suicide Bombers in it.
Although I do understand your concern.
Thanks.