Right now, the country is mostly united. But the voices of derision and division are starting to be heard. An Afro-American newspaper in Baltimore says, basically, that the Taliban are right: "America doesn't play fair, she does not live up to the code which she expounds as gospel. Instead of being a role model, such as the world racism conference where she walked out, she finds herself reaping the whirlwind."
We're hearing voices that Islam is a peaceful religion. Then let those who are peaceful denounce the extremists. These people are smart. They know if they can undermine our resolve they can mute our response and make us vulnerable again.
That's what Communism's fellow travelers did for years. The left in this country constantly apologized for Stalin and Mao. Jesus said to beware of the yeast of the Pharisees. We should also beware of the infiltrators, apologists and America-haters. Look for them to raise their ugly heads in even greater numbers.