A niqāb or niqaab (نِقاب niqāb), also called a ruband, is a garment of clothing that covers the face, worn by some Muslim women as a part of a particular interpretation of hijab (modest dress). According to the majority of Muslim scholars and Islamic schools of thought, face veiling is a requirement of Islam; however a minority of Muslim scholars assert that women are not required to cover their face in public. Those Muslim women who wear the niqab, do so in places where they may encounter non-mahram (non-related) men.
If we were to take each by its correct definition, we will be able to see a difference here.
Western countries are generally democratic and secular. That means the political party is chosen by majority of votes, and secular is that religion has no involvement in the affairs of the government or laws.
Well, that's what it is assumed to be.
So, one can follow any religion, and the way they dress is not dictated onto them by government or law.
An Islamic country is different. It functions within what is mandated by religion. There is the public sphere, and the private. In the public, whether you are religious or not, you must observe the law of the religious state. In the private, you can do as you wish, if you are not religious or follow another religion.
So, after this very brief definition, according to the Western system of government and secular law, banning someone from wearing a religious garb is certainly against the very foundation of what they claim they have, which is freedom of expression of what to wear and which religion to follow, under secular rule.
You can condemn them based on what they are claiming they uphold, and that is the sad situation of today's society, unfortunately.
With prayers for your success.
Most of our Maraaji' of Taqleed state that covering the face of the female is not obligatory except when not covering the face can cause harm, but in usual cases, it is obligatory to cover all the hair, head, neck and whole body except the face and the hands.