Muslim women are only allowed to expose their face and hands according to the traditional understanding, and even the face is a lot according to some who order women to cover the cover the face as well. Many sheikhs become angry if a few strand of hair get exposed.
But Christian women don’t have such strict, rigid dress code for them, as you can see in the right picture, dress like this where they don’t cover their arms, legs, head, neck would be accepted as modest by their Churches. People on this subreddit won’t find any immodesty in them either, but a lot of Mainstream Muslims surely do.
What is the reason?
Anti-communism. Most countries in the mid east were much more progressive until the 60s or 70s, when the west started to encourage religious radicals to counter soviet influence.
But as somebody else said, this is not mainstream islam!
It looks like Islamic socialism is still active, which is hopeful. I wonder if it’ll gain more ground as the US empire crumbles
https://en.wikipedia.org/wiki/Islamic_socialism