The story of the Sikh man being shot resembles many such stories as this:
“A French nursery school teacher on Monday claimed he was stabbed in his classroom by an Isil supporter before admitting he invented the entire story, as tensions run high after a series of terror attacks in the country.”
I know I'm just making stuff up - but getting called a name or something like above during an argument doesn't mean the argument was about race or whatever.
Now - shooting the guy for making too much noise (in my make-believe story) - that doesn't make much sense either! (Unless the jerk used a silencer - um, I mean “suppressor”).