My takeaway from your data is that people call each other various shades of dishonest a lot more than they call each other stupid.

And those are two very different things that don't got much to do with how big the words you type are.

It's easy to not be entirely honest in an argument due to various biases, or when you have some sort of emotional attachment to an argument. That can be a reasonable thing to point out.

Calling people stupid, on the other hand, that is pointless and purely inflammatory.