Pervasive meaning...if Muslims try to systematically change many "routine" culture norms in present US society to conform to Islam, not just school attire...but gender seperation, other tolerances, zoning for place of worship...etc...
How would you like it if Muslims sued a city council to change church zone to be "Mosque exclusive" b/c Sharia law mandates that no other faith can have a place of worship within 20 blocks? (This might be an extreme example, but, Islam is arguably a religon of extremes.)
That escalation in action by muslims, is what I mean by pervasive, and what would cause blow back.
Similar school dress outfits, you're right...but...slippery slope fallacy aside, we'll just have to wait and see.
There is a big difference in equesting an exemption on gym wear based upon morality or religion than imposing restrictions on everyone else.
I agree with you - just saying it's taking a while for the public backlash to occur.
To me the bigger example was in Michigan where they got an exemption from noise ordinances to broadcast (over loudspeaker) muslim calls to prayer throughout the day (first call to prayer at 6am and last call to prayer at 10pm).
This is beyond the churchbell thing (which is music/not words, non-amplified, and is not done before sunrise or after sunset).