I can kill Sinjin and his pals but want to know if not saving Kent impacts the game at all?
if kent dies, (or lives and you dont convince him to keep going) you cannot upgrade the silver shroud armour
Very important. What would the Silver Shroud be without his faithful friend Rhett Reinhart?
There is no consequence, but if you like the Silver Shroud costume, he will upgrade it for you some times after the quest is over. You can snipe Sinjin's head from afar. They will start to shoot you if you get too close to them, reload a save and get close enough to him while he speaks, it may allow you to speak with Shinjin.
Use Jet and Psycho.
http://imgur.com/a/NjVqO
If you kill Shinjin with a snipe, he won't kill Kent. Yeah, regularly, they shouldn't go hostile unless you get too close to him, walk toward Shinjin, after he's done talking, he won't do anything, and if you keep your focus on him, a dialogue option should appear. Are you in Power Armor? Sometimes Power Armor could mess up the dialogue options for certain quests.
don't snipe him as the door opens. play the quest scene out. intimidate his cronies with the Silver Shroud Intimidate option. Then, as soon as the scene ends, pop jet and psycho and blast him to hell.
I killed him with Kellogg's revolver from the elevator.
if you have decent charisma its a rather easy
just convince sinjin that killing you first will hurt kent much more, then they will all target you not kent
Use psychojet! Best of both worlds lol
If you don't save Kent I don't think you can upgrade the Silver Shroud costume, so it depends on how you feel about that. Also, Kent is a great guy so you should go the extra mile for him. If Sinjin won't talk to you, that must be a bug or you must be opening up on him before the scripted conversation starts. Make sure you are dressed in the Shroud costume or else it might not trigger. Best way to take him down is saving before the speech check and then goading him into "killing you in front of Kent". That speech option will make Kent non-hostile to Sinjin and his cronies, allowing you to focus fire on him. Then just use psychojet and blow him to hell lol.
I just talk to sinjin as the shroud...he hates it and his little pals crap thier pants, and actually stand in the corner and beg you not to kill them, it's hilarious.