I was under the impression (although I could be wrong) that the reasons why people come out so strongly against burquas, as well as the reasons why they are different than the example given in the op are as follows:
1. I think that many Gedolim may have come out against it.
2. It is something that is done publicly, and VERY publicly at that, since you can’t really avoid seeing it.
3. I think they are trying to convince others to do the same.
4. I think that many feel that it is actually very untznius.
5. Many feel that it is coming from unhealthy attitudes towards tznius.
6. There is a real danger that many people might copy them and develop and spread these unhealthy attitudes if the Gedolim and the oilam do not come out against it. I can really see this because I know that when I read articles about it, I do notice myself being drawn to it on some emotional level.
This does not happen when I read about pictures of 4 year olds being blurred. This is one of the reasons why I think it’s coming from something unhealthy, because you do not usually feel yourself being “emotional drawn” to tznius. I think it comes from the fact that the Burqa wearers quoted in the articles I read had a very cultish mentality that came through in the articles.