Really? I think you're the first Illini fan I have EVER heard say that ... I don't know if it's the shared animosity of Indiana or the fact that Purdue has a relatively small/"refined" fan base (i.e., fewer numbskulls on social media like a Michigan, lol), but I just find Purdue SO hard to "hate," haha. Historically, when you look at the entire history of the program, it is hard not to say Indiana is the "biggest rival" ... however, I think you can make a case for a couple, depending on where you live and your age:
Indiana: Incredibly close series between the flagship schools of two bordering basketball nations. Forget the Henson/Knigh feuds or Eric Gordon; there really
is a feel during this game sometimes that it's our two great and storied basketball STATES going up against each other.
Iowa: I cannot imagine how much I would have hated Iowa had I been of age during the Bruce Pearl saga and we had some recent bad blood during the Ayo years, so I genuinely get the "hate Iowa above all else" crowd. Additionally, Iowa fans
really do have a strange animosity toward Illinois as an entity - from the school to the state to the team - in a way that they don't toward other rivals that they might even hate MORE like Wisconsin. It's hard to explain, but I lived in Iowa City for a long time; it's a weird combination of being intimidated by the Illini and having a bit of a Napoleon Complex while also completely disparaging us and showing us no respect. It's bizarre and bitter, but I'll say that most Iowa fans are incredibly nice/chill compared to a fan base like Michigan or Indiana or Ohio State if you can get past this initial rivalry hatred, haha. However, Iowa has rarely been good WHILE Illinois was also good during my lifetime ... pretty much only since 2019-20. So, at times the rivalry has seemed dead to me.
Michigan: I assume this stems from the 1989 loss and general Big-Ten-wide loathing of the Wolverines, along with some recent bad blood about their COVID pause abuse and Dickinson running his mouth, but count me out on this one. Michigan's focus has always been SO skewed toward football, and they have other rivalries that they would always prioritize in Michigan State and Ohio State.
Michigan State: This one is weird for me, because it was so artificially friendly during the Weber years, and then we sucked so it didn't matter. During our ascension, MSU has been down compared to their normal selves. Other than the cheap shot on Ayo, this one seems like a generic series against a good program.
Northwestern: Really all this one has going for it is that NU is the only fan base where 90%+ of their fans would name us as their biggest rival ... so it would at least be reciprocal. However, they have been so historically bad while we have been pretty good that the animosity is just so low. Even at its height during the "Chicago's Big Ten Team" crap, it just never picked up that much steam. However, I have no problem calling them a rival (I think gatekeeping that term is the height of cringe, personally) in the way that Tennessee is a "rival" with Vanderbilt and Georgia is a "rival" with Georgia Tech. Both programs throw a bone to their (private school) little brother instate, even if their fans care more about other rivalries.
Purdue: Again, for me, this one is just lacking. Both fan bases, by and large, absolutely hate Indiana and there has just been a surprising lack of bad blood over the years. Additionally, of all of the teams on this list INCLUDING Northwestern, I have had the most chill/non-confrontational interactions with Purdue fans both online and in person.
Wisconsin: This REALLY should be a bigger rivalry in every sport to mirror a Bears/Packers dynamic ... but it just has never been. A likely reason is that Wisconsin historically sucked at everything and got good at football right as we slid into the dark ages. Maybe this one will pick up with BB at the helm for us and spill over into hoops?
Missouri: Personally, I am a sucker for non-conference, out-of-state rivalries where the two rivals have absolutely nothing to bond over. Indiana and Purdue "hate each other," but they're both so far up their a$$ about the state of Indiana's basketball lore that they have a lot in common there. Florida and Georgia "hate each other," but they'll both start a cringe "SEC! SEC! SEC!" chant with the best of them. When we suit up against Mizzou in that epic atmosphere in St. Louis, I feel nothing but hate, contempt and a burning desire to start the Christmas season with BRAGGIN' RIGHTS. I understand this one is way bigger for folks in the St. Louis area and Southern Illinois, but honestly the lengthy history and unique setup puts it at #1 for me.
With all that said ... every time we actually suit up against the Loosiers, I find myself ranking them #1 on our rivals list yet again, as I absolutely hate them and their deranged fans.
Let's pummel them!