They would claim it if they thought it would help them to do so. Not everyone thinks the same way you do, Link.
While www3 lynching UTA is not a 100% clear, it definitely made him less likely to be mafia than anyone else still alive. No one counterclaimed KDZ, and the only person that would fake claim vulture is mafia, but since there was no counterclaim, we can safely assume KDZ is telling the truth. That clears JCJ as well, which leaves you and dawn.
There were three people that were almost definitely town and two that were dubious. If you aren't certain, base your lynches on percentages.
Anyway, what do you mean the nightkill is now factional?
Also, I request that you remove phoenix from the game. Partially because re-entering the game is dumb, and I think it's a bit OP. Game starts, claim phoenix, mafia won't kill you because that confirms you as town, town won't lynch you because they'll have to do it again. It's a free ride to the end-game. Only way to stop it is fallen elf, unless role blockers temporarily stop it until the next night phase.