Like it or not, that is part of almost all racing series, whether the racers tell you that or not. Blocking for your team, or letting up to let a team mate by (who needs the points in championship hunt) is done frequently. We don't always realize it, and the racers rarely talk about it.
Kurtis is young, but a very talented racer, and a good team player. However, he has to learn when and what to say. He made some remarks after the season ending 600SS race last year at Willow, about how he just stuffed it inside Hacking and Bostrom on the last turn. Something like, "Well I just through it in there. I was either going to win, or crash and take them two with me." While we may not agree with that being proper racing, it is done a lot. But he should not have said anything. You'd think that King Kenny would help tutor Kurtis on these fine points of racing PR.