Billionaire hedge fund manager Bill Ackman took to X, formerly Twitter, to question the tax exemptions of high-cost private universities amid the ongoing student debt crisis. What Happened: On Sunday, Ackman tweeted about the burden of student loans, specifically referencing the cost of attending Columbia University. He questioned why Americans who don’t attend college or opt for lower-cost public universities should subsidize private institutions and their endowments. He also criticized these universities for their “poisonous ideologies”. See Also: Elon Musk Reacts To Alleged Israeli Airstrik…