Why is this concept so hard to grasp?
My suspicion, of course, is that it is not difficult to grasp but socially and politically inconvenient sufficient to disallow many people from even thinking about the question.
In any case, this is my response to a gentleman on a pro-Israel Facebook page who is concerned about anti-Muslim bigotry within the Jewish community.
It's not a matter of "all Muslims."
In truth, the concept is very simple.
Sharia law claims non-Muslims as infidels and those of us (Christians, Jews, and Zoroastrians) who are considered "people of the book" have the choice of conversion, submission, or death. Gay people are forbidden entirely and women are chattel.
Thus political Islam has emerged as the foremost threat of non-Muslims, Gay people, and women throughout the world.
Furthermore, Muslims throughout the Middle East are anti-Semitic in rates that go from the mid-70th percentile (in the more liberal countries) to th mid-90th percentile in the so-called "Palestinian territories."
And, needless to say, the foremost victims of Islam as a political movement are Muslims who are not sufficiently devout according to their persecutors.
Christians may have been the foremost persecutors of Jews in the past, but today the primary culprit is political Islam as it seeks to undermine, and eventually destroy, the well-being of Jewish people throughout the world, via undermining the well-being of Israel.
In Europe, mass Muslim immigration is turning that continent into a bloody mess because the Muslim immigrants generally refuse to assimilate and maintain a perpetually hostile stance toward their hosts, complete with indifference to the authority of the state or the dignity of non-Muslim women, who are generally considered something akin to whores.
Does this mean "all Muslims" are bad people?
Of course, not.
Condemning Islam as a political movement (Political Islam, Islamism, whatever you want to call it) is no more "racist" than opposing Nazi Germany was "racist" toward Germans.
Further, it becomes difficult to understand how anyone can consider themselves "progressive" or "liberal" or concerned with universal human rights if they refuse to make a stand against a massive and growing political movement that hangs Gay people from cranes, holds non-Muslims as second and third non-citizens under the rule of dhimmitude, and keeps women quite literally under wraps.
All true progressives stand up for the rights of the oppressed and, yes, that includes when Muslims are doing the oppressing.