Because he is a hypocrite. He did the same thing at Indy.
Jimmie has always been respectful, and a clean driver. He made a mistake, spun himself and collected Truex.
I think the idea is that Truex should have a bit of self awareness, emotional intelligence, and impulse control as a champion and ambassador of the sport. He has every right to be fustrated. And has every right to disrespect Jimmie. But he should be better than that. As a fellow champion, who has done just that, yeah, he should have been a bit more respectful to a fellow champion.
Plus, he came off like he was talking dowm to him, it was kind of pathetic. But if that's how he feels he copes with fustration, I guess that's how how he does it. Not everyone can introspect emotionally
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