From what I have heard so far I think your idea would be too impersonal. I think he had to look his victims in the eye and enjoy how they were afraid of him now. There is also the question of whether he was struggling with his own sexuality since he had been to that club before. He killed so many who were Hispanic and somewhat “brown” like himself. Was it self hatred operating?
He was so “struggling” for sure. He was a believing Moslem. He knew he was destined for hell as a homosexual unless he went out in official martyrdom, died killing infidels. Martyrdom transports him to Paradise.