Why did the kurds kill Sgt. Andrew Joseph Doiron?

The reason of for which Sgt. Andrew Joseph Doiron was killed by the kurds is the following:

"When they returned, the peshmerga asked them to identify themselves," Hekmat told the AP. "They answered in Arabic, that's when peshmerga started shooting. It was their fault."

You cannot speak arabic around the fascist peshmerga.
I have told you times before, that the fascist peshmerga are killing innocent arabs as they want to cleanse the disputed areas from non kurds. This time they killed SGT. Andrew Doiron. May he rest in peace