So, they are asking for PROOF of what he said was NOT hate speech, instead of seeking proof from the accuser that it was??
Welcome to Soviet America folks, it is not that far off now.
This is a private company, which doesn't have police, a military or a praetorian like governments. Hence lots of bad things can happen to them.
i.e. - They might get thrashed by congress, sued, bankrupted, have limbs and jaws broken by people who get close to them... all kinds of stuff like that.
Proving a negative?
Typical tactical the left. Make an accusation and then demand you prove it isn’t true. Knowing that logically you cannot prove a negative. And everybody keeps falling for that. Somebody needs to demand that they prove the positive.