GME was heavily shorted at ~148% and the institutional shorts got too greedy and /r/wallstreetbets caught them as they failed to close their shorts.
Now they are forced to buy back the stock to cover their positions whist everyone is buying and holding GME as the stock price goes higher; rinse and repeat.
If anything, the hedge-funds over-shorting these stocks are the criminals which have manipulated them (GME) for years with other hedge-funds bailing them out and the media covering their asses for their illegal activities; as usual.
Then they cry and lie with the media: 'ThiS is mAnIpulAtIOn' to /r/wallstreetbets.
All I can say is: /r/wallstreetbets is literally robinhood.
As your link explains “Naked short selling, or naked shorting, is the practice of short-selling a tradable asset of any kind without first borrowing [...]”
https://en.m.wikipedia.org/wiki/Naked_short_selling#%22Norma...