"Dont confuse denominations and nationalities with cultures. None of these differences are causing beheadings and suicide bombings between our citizens."
Denominations and nationalities are major components of what makes a culture. The fact that different groups of Americans don't kill each other does not mean that we are not multicultural. It just demonstrates that the American system respects all cultures, which is why Islam seems to be in such conflict with our system. Multiculturalism is a good thing in America and everwhere else. Politicians (especially liberals) just give multiculturalism a bad name because they attempt to use it to divide the nation for political gain. The only thing I expect from different groups in this country is for them to assimilate to the overall American philosophy.