"You may attack Officers to save others..." is literally the rule. Either you are wrong or the rule is wrong, in which case "attack Officers" to save your friends is an incredibly misleading rule. I myself have played many hours on Diverge for many years (since its launch), and as far as I've always understood it and have been told, you may attack Officers to save your friends. Obviously, "save" is a pretty ambiguous term but the worst thing a cop can do to you is arrest you. Like there is nothing else to save them from. I don't see how you can say that he can't attack cops to save his friend. Please explain how you interpret the rules. Regardless of context, he followed the rule. I mean you're talking about all this he needs to understand the rule book.
Not to mention once the cops start shooting back, he can't have RDM'd them. Even if the first kill was an RDM, once the cop shoots back at him he has a roleplay reason to fear for his life. And THEN, the other cops showed up and tried to arrest him. Totally apart from the first group he killed, responding to the situation, and he is fully justified in killing them.
ps: wow nvm you're clearly just an idiot. Even the second clip shows these cops are minging. They are the ones RDMing. It's pretty obvious. They literally tased this guy for no reason just because he was talking smack to him. If that was a reason to engage in combat, this entire server would be Free For All MW2 Rust deathmatch. You need to banned to better understand the rulebook you fucking idiot.