Man knows there is a greater being
Hm...this sounds like of a variation of the "No True Scotsman" fallacy. Are you asserting that all atheists actually do believe in God, and just pretend they don't?
Yep.
Once they make the argument “Which God” they have revealed their bluff.
I see no point in arguing with them or discussing God unless they have questions and at that point they are again conceding the possibility and all I do is create arguments of influence not some imperitive that a decision must be made now.
They feel manipulated and to date I count one aetheist who came to Christ of his own volition because something was missing and once he realized that he was compelled to ask “Is it God? If he is real and I can ask questions of him, will he return an answer?”
Once he asked those two questions he asked for God to come into his life if it would fill that void.