[Right Wing Professor]

I don't have the book at hand

You accused a man of calling for concentration camps, and when challenged, you won't even attempt to stand behind your words. How contemptible!

[metacognative]

Stay angry. I'll get back to you after I get on with my life

[grey_whiskers]

You accused a man of calling for concentration camps, and when challenged, you won't even attempt to stand behind your words. How contemptible!

In general, such behaviour could be attributed to laziness, but since the accusation did involve concentration camps, contemptible is a pretty good word choice.

Cheers!