Wow, just wow. Yeah, if you're not going to bother porting it, make sure Wine handles it. If your going to do ports (as to Mac) just use open GL or a cross platform engine then a Linux port is trivial. If he is advocating never native port a game to Linux he needs to be quiet.
When android and Chrome OS take over I can't wait to see him to eat his words. Unbelievable coming from the head of ID. I just broke a copy of RTCW in disgust.