Most people weren't saying that the price would crash instantly after futures trading was introduced.

If the price is going to crash from futures trading (it's not inevitable but it's certainly possible) it'll most likely be some sort of major group with the ability to attempt aggressive trading, like a hedge fund for example.  Due to the relatively low liquidity, they could make a hell of a lot of money by shorting it.
No guarantee that they're trying, or that they all believe the same things about BTC's current state.