Barry
You’re right that we have to make a clear distinction publicly that these sort of fringe groups do not represent the Jewish majority. The problem is that its really hard for manhigei Yisrael to label this group as problematic. Neturei Karta is very anti zionistic so they side with people who are also anti zionist. The problem is that in this post-WWII era, people will not openly say they are anti semitic, they’ll say they are anti zionist. So these groups are siding with people who hate Jews.
Unfortunately, the Manhigei Yisrael will not openly say this. The Yeshivish Olam can also be said to be anti-Zionist, in that they are against the government and the establishment of the state of Israel. However, the Yeshivish Olam does not side with non-Jews to protest. Because of the similarities of mindset, I believe there will not be a clear distinction made between these radical groups and mainstream Orthodoxy. Without a clear distinction made, the secular government can’t prosecute radical anti Israel and anti-Jewish protests by the Neturei karta. So, their actions are protected by freedom of speech and they will not stop their behavior.