By Andrew Gould Colin Kaepernick’s comeback attempt might be gaining momentum. Attempting to receive his first NFL opportunity since 2016, the quarterback worked out with the Las Vegas Raiders on Wednesday. According to NFL Network’s Ian Rapoport, they were “impressed” and “the door is open.” Some fans are eager to see the 34-year-old return to the NFL. Kaepernick became a divisive figure when protesting racial inequality and police brutality. While teams appeared to deny him opportunities to avoid angering fans with opposing viewpoints, signing him now could be a positive PR and business move…