Calling Obama a 'closet Muslim' is like calling him a 'closet Socialist'. There is nothing 'closet' about it.
For his 2012 re-election campaign, this arrogant, narcissistic POS hand-picked his historically documented Socialist Symbol and Slogan, believing that voters were too stupid to notice, that if they did notice they would make excuses for him about his not fully understanding what they were OR they wouldn't care and would still fully support him anyway. The media downplayed the whole thing, and Obama laughed his ass off.
His entire administration has been partly about advancing Islam, and he has continuously aided and abetted Islamic Extremists and terrorists. This latest visit to THE Mosque - associated with TMB, associated with Al Qaeida, known for radicalizing Muslims - he just visited was another one of those 'F. YOU, America' moments, just like his 'Socialist Icon/Slogan' back in 2012, and once again he did so knowing people are too stupid or too partisanly loyal to care.
He hasn't been hiding it....he's been 'out of the closet' from not long after Day 1.