Well, I have a problem in the quest Reilly's Rangers, I do everything right, clean thoroughly the hospital and the Statesman Hotel in any super mutant but when I reach the top, the battle between the Super Mutants and Reilly Ranger, I help kill the Super Mutants, and ends when all they are hostile to me.

Note: The second time I went to Ranger Compund, to see if solved, but they kept attacking me when he finished the onslaught of super-mutants.

Sorry for the bad english, I'm Brazilian.

It appears that either you hit Reilly or one of the Rangers by accident.

Or I think they are hostile if you have Fawkes with you since they don't recognize him as a "good mutant"

Yes, the first time I went with fawkes.
But the second time, I was alone, and was targeting the base of the ladder, I think not hit anyone

Sometimes this glitches for me as well. When you get on the roof, instead of fighting, run like hell to the rangers. Seventy-five percent of the time this works the first time around. If not, reload, and keep running as fast as you can to meet the rangers.