Citadel Securities (the market maker that buys and executes Robinhood's order flow) and Citadel (the investment group) are very different companies, and they have a ton of red tape in place to prevent risk of collusion between the two.
Considering Citadel Securities makes _significantly_ more money than Citadel would stand to lose with its short positions, the thought of the two colluding to pressure Robinhood seems a bit far fetched to me.
So all it takes for a sound false flag attack conspiracy theory is for some sweeping legislation and some insight into which specific user accounts started this whole ordeal, not too dissimilar from the Capitol invasion and what has followed so far... heck it already seems clear if something isn’t beneficial for the oligarchy the media would bury it very quickly rather than fluffing it up to high heaven!
https://finance.yahoo.com/news/citadel-point72-back-melvin-2... (Citadel, Point72 Back Melvin With $2.75 Billion After Losses)
https://www.cnbc.com/2020/08/13/how-robinhood-makes-money-on...