It's a bad headline. They used publicly available blockchain transactions and didn't cause the collapse of the Terra ecosystem. Terra collapsed because it was a Ponzi scheme offering 20% APY on a fake stablecoin. The Terra stablecoin was not backed by real dollars, but instead by a cryptocurrency called Luna that did nothing else other than let you issue Terra stablecoins.

I mean they are being sued for insider trading, not exactly a bad headline maybe it could say alleged?

It seems extremely unlikely to me, a casual observer of the shit show that was Luna/Terra, that the suit would be successful