Ehh... Doesn't prove this by any means. For example, a type of clothing called a "kurta" is worn by Hindus and Muslims both. In religious ceremonies in both religions, attendees usually wear it. Now, this doesn't mean that the garment suddenly is a religious garment, does it? It just is a cultural garment that is usually worn in the Indian subcontinent.
Now, even if the abaya is a religious garment, the points that I mentioned above still apply. What if I started a new religion called "Religion of yellow clothes"? Let's say my religious clothes are all yellow clothes. Does France ban everyone from wearing yellow clothes now because of me?
Awww.... Good for u mate.. good for u....