Reply #1630: There are two areas of division on this site and it isn't left/center.

[Radical Activist]

Division one is political with three groups.
1) People who will defend Obama at all times.
2) People who criticize Obama on specific issues when they believe he deserves it.
3) A smaller group who actively campaign against Obama, frequently attacking him fairly or unfairly no matter what he does (these may be left or right).

Division two is non-political, although it's a tactic that right-wing trolls are known to use as a method of destroying public forums.
A) People who stick to issues.
B) People who frequently instigate personal attacks and/or engage in cyber-stalking/bullying behavior.

Groups B and 3 are destroying DU, they often overlap, and the response to it has been weak.