Islam is not compatible with Western Civilization or American values and no coexistence is possible.
Islam is a political ideology disguised as a religion.
It is antithetical to the US Constitution.
Islam has no place in the USA, and should be considered a criminal terrorist organization.
In the interest of maintaining the entirety of the first amendment (because the libs sure as shit won't), I would say that Islam as it currently exists is incompatible with Western culture. Few though they may be, there are reformists within Islam (Mohammad Tawhidi comes to mind) and those who are willing to abide by the principles of individual liberty should be welcome.