If anything, Bane as portrayed in this movie is a left wing nut who uses class warfare as a weapon. In an otherwise positive review, liberal film critic Peter Travers complained about “the reactionary politics” of the movie.
Bane is a lab made monster created by the League of Shadows to get rid of Batman. They use all tools to destroy Gotham, including violence and “occupy” tactics. It’s not that they are left wing nuts, they use every tool they have to destory Gotham.
Okay, I’m a HUGE Batman fan and probably read way too much stuff about the movies.
For example, in The Dark Knight, the Joker represented terrorist and Batman president Bush. Notice at the end, Batman becomes “the bad guy” to fight the terrorist. (director Nolan made this comparison himself)
He takes the blame for Dent’s death and those Dent killed. This spurs the city to get really serious about crime to the point he, Wayne, “quits” being Batman. It’s so successful the mayor is going to broom Commissioner Gordon out of his office because he’s a “wartime commissioner” and now they have “peace”.
Of course, that doesn’t work out when eight years later Bane comes to town in another plot by the League to destory the city and Batman.
These aren’t spoilers, I’ve read most of the synopsis online.