IIRC, there was more that happened before that bit, in which Bezos came off as more empathetic and sharing the moment with Shatner, and then only later also engaged more with the people there who wanted to pop champagne.

People who saw only the footage from a videographer who missed much of it, or which was edited cynically, got an inaccurate impression.

(Shatner was understandably moved by the space flight experience, maybe by something like https://en.wikipedia.org/wiki/Overview_effect )