The U.N. Human Rights Committee was not convinced the ban is necessary or proportionate.
One far-right Dutch politician said the next step is to "close all the mosques in the Netherlands."
The Islamic veils, which cover all or most of the face, will be prohibited in public spaces starting in August.
Denmark's justice minister claimed veils like the niqab are "disrespectful."
If the law passes, covering one's face will be banned in government buildings, on public transport, at schools and in hospitals.
"The way to integration beyond the burqa lies through education and emancipation, and sweeping bans inhibit that process," one politician says.
Anyone who pushes for a ban on burqas must, as a responsible politician, also consider the possible consequences. We're not merely dealing with a piece of clothing; we're dealing with the unity of our entire society.