Plot hole: At the start of the gun fight at the house, a snowball is thrown at Jack who then follows the person into the street. When they turn around the person is wearing a hockey mask and Jack realises he's in trouble. Jack would've seen the person wearing the hockey mask when the snowball was thrown, as the person had to be facing him to throw it. There was no reason after that for Jack to follow him.
Continuity mistake: When Victor Sweet is reaching his gang at the end the car shown from the above is a GMC Yukon but actually he is riding in a Lincoln when the car is shown from the front and when his car stops nearby his gang. (01:32:04 - 01:32:47)
Answer: Yes he actually is gay and the other brothers tease him but as more of a loving way.