Its not about judging individuals but the evil ideology of islam. While Jesus said not to judge individuals, he certainly advised judging right and wrong and certainly made such judgments himself. Of course, Christianity has nothing to do with the evil of islam anyway. But, individuals do have the choice of abandoning the evil of islam and the evil example and words of the thieving, raping, murdering, freak of a cult leader muhammed. If they don't follow those teachings, they aren't muslims. If they do, they are evil.

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Qur'an:8:39 Fight them until all opposition ends and all submit to Allah.
Qur'an:8:67 It is not fitting for any prophet to have prisoners until he has made a great slaughter in the land.
Qur'an 8:12 I will terrorize the unbelievers...Strike off their heads and cut off each of their fingers and toes.
Qur'an 9:5 Fight and kill the disbelievers wherever you find them, take them captive, torture them, and lie in wait and ambush them using every stratagem of war.