The SEIU has a lot of bread, and these out of town protestors have no connection to the area.
This bail seems a bit excessive to insure that these suspects make it to trial, but a substantial bail is certainly in order.
I think it's apparent that the Harris Co. DA's message is that he knows the well-heeled unions are behind the protests, so they can pony up the cash bail and think twice about where they're going to take their rent-a-mob next time. If the unions don't put up the cash for the bail, they will find themselves with no protesters. They're going to have to pay to play that game.......and keep the bailee on a short leash to make sure he shows up in court so that the bail is exonerated.