You are willing for Christianity to be banned?
Christianity is a belief, not a style of clothing.
So how is this different from people like the Amish who wear a distinctive style of clothing, or nuns wearing habits, etc.?
IMO, the difference is that the burka completely conceals a person’s identity. In addition, it is often very menacing-looking. I have seen people in burkas that look like Darth Vader, very creepy and ominous. There is no telling who might be under it or what else might be concealed under it. I don’t think very many people have ever felt menace from a nun or an Amish person’s clothing.