Regardless of whatever Kenny G did or didn't do for the world of jazz after reading that Matheny article I can safely say ol' Pat went from being some guy I'd heard about numerous times whom I had eventually planned on checking out to now being someone I'll never bother wasting my time on. I can't believe how much of a twat he managed to come across as.
Never let a person's character dissuade you from checking out their art. MJ probably molested kids, Axl is a world class dickhead, Ozzy tried to strangle his wife, but I enjoy the music of MJ, GnR, and Sabbath. Metheny is a great guitarist, and he overreacted a little bit about Kenny G's stunt in that article (though I can understand where he's coming from), but don't let that keep you from enjoying his music.
On topic: Kenny G sucks, but its kinda cool that he's an Opeth fan.
I'll give you the benefit of the doubt on that one since I've always been pissed at people who ignorantly shit on Metallica's 80s catalog just cuz they think it'll make them as "cool" as the other pea-brained poseurs who are "no longer a fan" of a band they probably never listened to in the first place beyond a few radio hits.
Now for some light-hearted semantic merriment:
MJ was never proven to have done a single thing.
G 'n' R only had one good album plus an additional album's worth of very good material spread across two albums (UYI I&II)
Tell me with a straight, unwavering face that the thought of strangling Sharon has never crossed your mind.