"What is Mueller's Military background and why is it important?" He's a Marine Captain and a decorated combat veteran. That's not the resume of a criminal or someone who would betray their country during one of the most crucial moments in US history. Q also said, "It was not supposed to be revealed POTUS is not under criminal investigation _ NOT YET. Traitor." The negative stories that we hear from the media are necessary in order to manipulate the leftists into thinking he's corrupt and going after POTUS. As a result, they support him. Leftists have literally been worshipping Mueller for a year now. Now, they will have to accept all evidence that he presents of Obama's treason.
I trust President Trump's judgement though. He met with Mueller the day before Rosenstein appointed him. I believe Rosenstein is helping POTUS too. Sessions couldn't be the one to appoint Mueller bc it would have appeared too partisan since his senate confirmation vote was too close. Rosenstein, on the other hand, only had around 6 or 7 senators vote against him. This is the real reason Sessions recused himself. President Trump is is complete control.