Would the board allow a christian, for example, to post their opinion of our Holy Prophet (saw) if that opinion is hostile? They obviously don't agree on the prophethood of our Holy Prophet(saw), or they would've accepted him. Same can be said of hindus or others who consider muslims to be following the wrong way.
But then again, they dont claim they are muslims my friend.
p.s. im not judging you, just making a moot point you might have overlooked, hope you dont find any disrespect in that.