I would argue that they, overall, are not specifically targeting them, but just everyone who is in the way/looks to be in the way. 6 week training time, no idea how to deal with mass of people who are not just running from you and here you go - everyone looks like a threat/enemy - and then the untrained (and possibly scared out of their mind) geniuses just start waving their batons around.
It is really nothing new, have happened all over the world. Suffice to say - does not help the situation, just makes it worse. I am just surprised that there haven't been mass shootings by the panicked out cops.