Joey was being an a$$hole there. That is all. Not saying that that is bad. Just stating what was up. He and anyone else can justify it with, he was racing hard, he's in the playoffs, etc.
Over the course of the last few years, there have been many times where Martin got up on the wheel after a late race restarted and took a race. Anyone trying to discount Martin is not paying attention.
Fernando Alonso says he was "very impressed" with NASCAR star Jimmie Johnson's performance in a Formula 1 car after they swapped rides in Bahrain on Monday.
https://www.motorsport.com/f1/news/alonso-impressed-johnson-car-swap/4304650/
http://kickinthetires.net/index.php/2018/11/07/stewart-haas-racing-penalty-was-deliberate-violation-of-rules/
Stewart-Haas Racing penalty was deliberate violation of rules
"Cheating" is hard to state in this business. EVERY competitive team is "bending the rules" as much as they can get by with. If not, there would never be someone faster than the next team with all of the rules Nascar has in place.