I think perhaps he didn't mean to sound like a serious threat and when he realized what he'd done he pretended as if he didn't understand why Azer was upset. I do think Azer looks kind of childish here but that lawyer bit was way overdone.
It's not true that if they don't get kik package on npm they'll loose their trademark. It's not true that they can't prevent their lawyers from going after him, there are multiple ways to avoiding that. 30k$ is not high price for doing something you never had any intention of doing.