Basically, he is interrupting the military court system.
And then there was that local incident where he said the police 'acted stupidly' and injected himself into a rather local matter. City police, the facts were not in yet.
Treyvon Martin, again Obama has to open his fat stupid mouth. "if I had a son he would look like Trevvon". Obama made this rather insignificant event [on a national level] a national issue. And a racial issue.
In all 3 examples, it just illuminates where our president is inserting himself in the judiciary branch of our government where the executive branch does not belong. He is interfering with due process in our legal system, and he is contributing to social unrest.