The Satmar Rebbe ztvk’l zy’a broke the taboo and fear among American Jews of walking, publicly, in the streets of America dressed as a Jew.
You’re entitled to your opinion, but please realize the above is just an opinion. There was no taboo nor fear among American Jews (at least in the Northeast, where the Rebbe lived) of “walking, publicly, in the streets of America dressed as a Jew.” Please check your facts against the actual history.
Some people might have felt a need to modernize their dress in the new country and the Rebbe probably helped instill a pride in their traditional levush for those. But the assertion you make above…is simply not so.