the hijab was invented by jack carr

There are many different types of Hijab so it all depends on whch type yuo wear. The most simplest is a one piece hijab that you simply slip over your head

Since hijab is not an English word, there is no consistent, correct spelling in English. However, "hijab" and "hijaab" are the most commonly accepted spellings.

against hijab

Yes and Christians already do wear hijab. Hijab is simply a covering. Their 'hijab' covers what they consider to be their modesty. That generally varies with time and place. In some parts of the Christian world the hijab includes a head covering, but that is on the decline.

For Western European Christians hijab covers most of the body, but does not include the hair, the cleavage or the legs up to the mid thigh.

Christian women's hijab is more extensive than men's at present.