Why are we arguing about Northwestern? This is a weird Hill to fight for. Its not like they are a big player in overall realignment.
With that:
The B1G is not kicking them out, there are others that would go before them if they decided to kick anyone out.
NW is not voluntarily leaving the B1G for any reason, I dont even know why someone would think that, even in some moron Athletic writers pipe dream.
NW is not even remotely on the B12s radar in realignment and coming up with weird scenarios where they might be is ridiculous.
Trying to manufacture some far fetched rivalries because they are a private school makes about as much sense as any manufactured rivalries. They dont work, and trying to claim this school or that school is similar just because of private vs public makes no sense either.
As far as sports go, NW has much closer rivals in the B10 than they ever will have trying to manufacture them in another conference, because of some weird reasons.
If it is just about being private etc. you could argue has more similarities with USC that is now in the B1G than they ever would with BYU, and trying to claim BYU is on the same academic playing field is quite a reach.
There are a lot of pipe dream scenarios out there, but one that says NW is better in the B12 than the B10 is absolutely ridiculous.
So, again why are we arguing this? It makes absolutely no sense.