You guys are PAYING Renegade's enemies to do the quest for them. That means you are literally funding the war against Renegade and his guild.
OF COURSE he is going to interfere. If you don't want him to, DO THE QUEST WITHOUT HELP, LIKE WE DID.
So be a man, go get level 10k and a full T7-T8 set, find a blocker, put all your perk points into armor, deck yourselves out with gems, and do the quest like it was intended to be done. Don't pay Renegade's Enemies run it for you and expect him not to interfere, are you stupid?
I told you I wasnt even involved in any of this, so I had no idea that he is waring with them, and it does sound like it makes some sense they would interfere.
However, you sound REALLY mad right now. "be a man and grind the fuck out of a video game"? Strong neckbearding right there.