I wondered that too, because it is uncharacteristic for them to run up on their opponent. At the end of the game Carolina took a knee when they were in field goal range, giving the ball back to Arizona with time on the clock, so I don't think they were pulling a dick move with the 2 point conversion. If anything they may have been responding to some insults, perceived or otherwise, from Arizona (who had earlier gone for 2 when it wouldn't have changed the number of possessions needed to tie the game). There was a comment from the Arizona coach at halftime calling Carolina the worst second half team in the NFL, and that if Arizona scored in the first 5 minutes of the second half it would be lights out for the Panthers. I can only imagine that comment got back to the Panthers.
I am definitely luxuriating in the Panthers' season this year, because I have checked out of politics (ping me when the shooting starts) and am just indulging in mindless entertainment in the meantime. Plus after enduring so many years of mediocrity and awfulness, it's fun to now have a team that makes other teams and their fans so salty.