There are two types of mindsets in the world, progressive and conservative. A progressive mind tends to view the world by analyzing its complexities while a conservative mind tends to view the world in simple absolutes. Because of the stark difference in dichotomization progressive minded people tend to be less judgmental understanding that there are other perspectives that are held by others that they themselves may not be considering while conservative minded people tend to believe that they are right and that others are wrong, but also that because they are right they should impose their views over that of others. Just because a person holds liberal values it does not make them a progressive person, and on the other side, just because a person holds conservative values it does not make them conservative minded. There are many people who hold liberal values but are very militant in their approach; they ostracize those who differ, judge others in an arrogant fashion, and seek to discredit others. There are those who hold conservative values but are open to other ideas, are not militant in their approach, and are generally well mannered and content.
Just because many of you are against conservative interpretations of Islam, it does not make you a progressive and open minded person. What does make one a progressive and open minded person is, despite the fact that you disagree with other peoples interpretations, you stand up for their right to practice their beliefs. That is the essence of democracy and the essence of Islam. By seeking to ban their beliefs you are demonstrating that you are the same as the "maulvis" that you so hate; the only difference is that you happen to have a different opinion, but besides that, your attitudes, character, manners, and understandings are the same. A persons understanding of the religion is not in the religious opinions that they hold but rather in their character and how they treat others.
Living in a democracy, those who agree with the niqaab ban should be ashamed as Muslims and ashamed as people living in a free society. Again, understand that people have different religious opinions they believe in, just like you do, and put yourself into their shoes. You would not like your beliefs banned so you should not desire that for others.
Reflect on this quote which is said to be the essence of democracy:
"I disagree strongly with what you say, but I will defend to the death your right to say it." - Voltaire