Because it is another way to attack “the establishment,” that is, America’s Judeo-Christian heritage. The Leftists who have been infiltrating American institutions since the days of Woodrow Wilson know that they cannot conquer America by open revolt, so they have been trying for decades to accomplish that through attrition.
The goal of all these Leftists is to strip down everything that is “established” in this country: pride of our founding, of our history, of the wars we’ve fought, of our influence in the world, and strong Judeo-Christian values and ethics and a God-centered worldview. Their goal is to remove all that through ridicule (satire in entertainment and the arts), moral relativism, multiculturalism, and Leftist activism. This is the motive behind the “anti-establishment” movement of the 60’s.
Once all that is established has been removed, chaos follows that vacuum. Stalinist-type government officials then enforce order by imposing a bloodthirsty Marxist government upon the people.
I think you are right. It is not that the ACLU is pro-Muslim. It is that it is something different than mainstream and thus something to be tolerated and protected.
Activists seem to get off on protecting the different.
You’re pretty close to on target.