I can understand why the writer was upset about the way the couple treated him. No problem there.
But in the article to which the post links, the writer admits that he hinted STRONGLY that he would beat the crap out of the man in the seat next to him.
I got really close to him and told him, “Look, you know this plane ride is going end at some point, right? You have to get off this plane.”
The insinuation being "And I'll be waiting."
Essentially, at that point, the writer went from being in a stronger position to being in the weaker position. Instead of notifying a flight attendant about the situation, he turned to physical intimidation. I'd have kicked him off the plane, too, white, brown, pink or purple.