His shows became the fascist rallies he once alluded concert mobs to (in The Wall).
When the “pig” is paraded about the concert venues now, it is a scapegoat for the ills of the world (Christians, Jews, anyone who opposes Obama (including Hillary)). If there are any of those God believers in the room, “get them up against the wall!”. It’s been this way since at least his 2008 tour and continues to this day. Occasionally it makes headlines (I know there was at least one FR article this year).
Roger Waters has not been a member of the Pink Floyd band since 1984.