The gangs from Quebec are going against the HA quebec chapter.
They stopped paying the 10% tax to the HA, line many groups in Montreal never paid or stop paying.
Now the BFM guys are getting there drugs from gangs from Montreal.

The reason why many groups stop paying taxes to the HAs is because the city of Montreal is full of cocaine. You got the mexican cartels, the mafia, some gangs and other groups that import large quantities of cocaine. So the price of the cocaine has fall.
But the HAs want the groups to pay the same amout when the kilo of cocaine was 50k.

So before, you had to pay 5k for a kilo of coke (who the price was at 50k).
Now, the price of the kilo of coke is around 18k, but the HA still want the groups to pay 5k for the kilo of 18k. So now they are not paying 10%, but more around the 30-40%