Mosque near Ground Zero?

Why does most of the opposers arguments consist of "You don't see any Church's, or synagogues in Saudi Arabia/Mecca so why can they build a mosque here" Why are people so stupid and make such horrible arguments? First of all Saudi Arabia/Mecca are for religion. That's a holly religious place where they want to be able to be religious in peace. America on the other hand is NOT a religious holly place for any religion it is a free country for ALL religions therefore that comparison of building churches in Mecca vs Building a mosque in New York is stupid & invalid. Secondly the muslims didn't decide HEY LET'S BUILD A MOSQUE IN THAT SPECIFIC AREA. It was being used as a factory or something, then it was sold and it was already being used by religious muslims to practice their religion. They just now decided to reconstruct it and make it a mosque. Thirdly because of that very tragic issue, that isn't even 100% proved to be done by muslims(many people believe it wasn't) it doesn't mean all muslims are aiming to do that. It's not even in the Quran nor is it allowed in the religion.