Thank you for making this report!
After consulting with Para and Sora, I have come to the decision to deny this request. As Para said, Diet was well within his right to avenge a fellow miner. The clip being so short doesn't give us much to go on and refusing some the rightful benefit of the doubt would be wrong. I understand the frustration that comes from the decision, but this is not clear proof of RDM.
Feel free to upload a longer version of the incident to provide us a better picture. You are free to make another report at any time if you are not happy with this decision.