A community can do a lot: Inform the public -- relatives, neighbors, co-workers, politicians, university presidents, media outlets -- about the texts and tenets of Islam. Halt and reverse where possible Muslim immigration (importing Somalian jihad into Minnesota, anyone?). Punish for treason and sedition all those committing it by working to replace our Constitution with shari'a.
Secure the borders.
Don't allow American organizations -- like the American Library Association -- to cater to Muslim sensibilities or cave in to pressure from jihad's agents (CAIR, ISNA, MPAC, MAS, etc.), as in the ALA's recent and shameful censoring of Robert Spencer.
End Obama's bankrupting and disarming the nation, apologizing to Islam, releasing terrorists, and demanding that we respect Muhammad's "sacralized" genocide, murder, pedophilia, rape, mutilation, slavery, anti-Semitism, theft, deceit, and blasphemy.
Challenge Muslims on what their god commands and what their "ideal man," the "beautiful pattern of conduct for those who want to please" Allah, Muhammad, said and did.
Exercise your God-given, unalienable Freedoms of Speech and Assembly, and the Right to Bear Arms.
Speak Law and Gospel clearly.
There's a lot we can do.