Chechnya has a pro-Russian government and anti-Russian rebels fighting against it. Right Sector Ukrainians have been fighting on the rebel side in Chechnya for years (right alongside Al Qaeda), so my guess is these 'wild brigade' Chechens are pro-Russian and looking for some payback.
Nice fictional story about Ukrainians and Al-Qaeda.
“my guess is these ‘wild brigade’ Chechens are pro-Russian and looking for some payback.”
You are most likely correct...
The now-dead Sashko Bily/Oleksandr Muzychko, a Right-Sector Leader at the Maidan protests, and definitely involved in the violence, was wanted internationally for the torture murders of some 20+ captured Russian POWS in a Chechnyan jail.
This was a BIG issue to the Russians after the coup, and was likely the reason why Avakov had him killed.
OOPS... I mean, per Avakov, he shot himself... TWICE... while fleeing police outside of a nightclub.
Good guess Mac.