Dovid_yehuda, if they were wearing kippot, they would have been easily recognizable also.
However, the ultimate point is that their ACTIONS is what made the kiddush hashem, but the clothing made them identifiable. They ACTIONS could have made a chillul hashem also (not in this situation, just hypothetically).
I still think someone in the Bronx Zoo when its 90 degrees out looks ridiculous.
I also think women in pointy shoes look ridiculous.
Plenty of people think I am ridiculous in the winter when I don’t wear a coat.
However, the women in pointy shoes don’t think they are better people for wearing the shoes nor do I for not wearing a coat. The argument in this thread was turning towards “only don’t wear yeshivish dress if you want to emulate the goyim” which is the MOST ridiculous thing I have ever heard.