He never alluded to that. Reread the thread.
Again. He wanted Idaho because they can be a rival. You brought up New Mexico and Wyoming as potential targets. They are not rivals of Washington State, thus he would prefer them not be added. It's pretty simple to follow that. After he said they aren't rivals, you said this:
"Yes, I forgot the intense rivalry Colorado State and Utah State bring with every member of this new Pac. My bad"
I'm failing to see where he ever alluded to all the additions being rivals or natural rivals, or whatever you want to call it, between his desire to add Idaho and what you said in italics.
Again to sum up:
@wazzu31 wants to add Idaho because they are a rival.
@ralphiewvu says, what about New Mexico and Wyoming, they would be good adds(which I actually think New Mexico would be, but that's besides the point)
@wazzu31 says they aren't rivals.
You then say the italicized above. I mean it's a complete stretch to say he alluded to what you're suggesting between his initial post and your italicized one. It just doesn't make sense IMO.