I think having a mosque near Ground Zero is as normal and American as having any of the churches, synagogues, or other places of worship that are already there.
To have a Muslim center that is explicitly aimed at promoting peace and understanding between Muslims and others is a particularly good thing.
I don't really think any of this really needs saying. Alas, it does. So, as a Christian and a patriot, yes, please, build a dialogue-oriented mosque near the former World Trade Center site.