I think freedom of expression is an important thing. Maybe the battlefield is not the right place but it does not mean it should be censored.
There is a French proverb that says "Sticks and stones will not reach the white dove." I think it is well suited here on his insults. (But I don't know if the translation is correct).
The ban for 6 months is a punishment that seems ample.
If the death penalty had not been abolished, I think we should apply to his case. Unfortunately it is abolished, let him return to the battlefield, he fights with dignity!
Thank you