I rested at the winterhold inn and when I awoke everyone in the bar attacking that traveling bard character. I watched for a little but it seemed like he is unkillable so I left. What could have happened?

Isn't the Traveling Bard a vampire?

That's the Orc Bard, right? They make fun of him but he's okay. He's a nice guy, too...

I seem to remember hearing something about this, though - gonna check the UESP Wiki.

Edit: or the travelling guy that wants 25 gold for a song? Blonde guy?

Yeah he IS unkillable, heheh...

Wonder what he did?

That Orc is at the inn located in Morthal.

it was the blond guy