Why did Carl Edwards not get mad at Tony Stewart at Martinsville when stalled behind Tony?

Do you think Carl Edwards would treat Tony Stewart or Kevin Harvick the same way he treated Matt Kenseth? Who would intimidate who of the three?

I remember when Kevin was hot tempered himself. Is it a matter of time before it all breaks loose?
Update: But that is 2 heat of the moments for Carl. I remember him getting chummy with Dale Jr also a few races back. So it is beginning to look like more than just a racing deal.
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