BernieBros are part of the wider Brocialist problem. They will latch onto any left wing cause as long as they can warp it into being white cis-man focused. Women, POC, LGBTQ? They will all have to wait until after the Revolution when things will magically fix themselves.
On the other hand, there are false accusations of brocialism from the centre-right, which make it harder to deal with actual brocialists. But that is the point, get the left bogged down while the centrists get on with the hard job of making the world burn at a slightly slower rate than the right wing.