Trouble with Kant

We'll get to Kant in November, with 'Fundamental Principles of the Metaphysic of Morals' (which sounds like a made up title to scare people away from reading), but I ran across a news report from Russia that is just too good to share.  Especially the last bit.

An argument in southern Russia over philosopher Immanuel Kant, the author of "Critique of Pure Reason," devolved into pure mayhem when one debater shot the other.
A police spokeswoman in Rostov-on Don, Viktoria Safarova, said two men in their 20s were discussing Kant as they stood in line to buy beer at a small store on Sunday. The discussion deteriorated into a fistfight and one participant pulled out a small nonlethal pistol and fired repeatedly.
The victim was hospitalized with injuries that were not life-threatening. Neither person was identified.
It was not clear which of Kant's ideas may have triggered the violence.

"It was not clear which of Kant's ideas may have triggered the violence."  I can only believe that the writer was giggling as that was typed.  More experienced readers of Kant are invited to speculate on which idea it was.