Did he wrap the barrel in bacon, like Ted Cruz? Because if he did, I can totally see why Muslims would be offended. Otherwise I don't see any reason to draw a connection between this and anything to do with the mosque massacre or the mosque massacre memorial.
It's a politician, pandering to gun-ownership voters. Why read more into it than that? Sometimes a cigar is just a cigar, and as I hear it, Kevin O'Leary is a total cigar-head in real life.
-k