ICOT you said Live and Let live is not a jewish concept
So if you see a jew doing wrong, you are supposed to give chizuk
This woman feels that Satmar is doing wrong and she is giving chizuk to the Satmar communinty.
When Satmars have Tzniut signs in Kiryat Joel and Williamsburg they are giving Chizuk to those who did not ask and might now want.
Whether you agree with her chizuk or not is not the point. People here seem to be freely in giving chizuk to things they feel are wrong (even if they arent)