Ireland:

If someone wrote an honest song saying why they thought the deaths of 9-11 were in some way glorious, I would listen to it without offense if I could understand what they were trying to say.
Granted, that is a pretty big "if"! :>) It is perfectly possible to tolerate a point of view with which you do not agree, and running around hoping not to have anyone disagree with you is hopeless and self-destructive.

If someone wrote a bunch of negative crap glorifying death which they did not honestly mean I expect a lot of people would be offended. I feel that way about rap music, largely -- it communicates in order to offend, and although I find it irritating acoustically, all it tells me is that some ounk is trying to pull my chain, which I decline to have pulled, thanks.

Being offended by X is a two sided transaction. There's no law that says you have to hand your emotional state over to some ass hole and allow him the provelege of making you be offended. You get to design what you will and will not react to. So of course, the event of person A being offended by person B is entirely a matter of subscription and intent by both parties.

A