It’s possible the Satmar Rebbe put anti-zionists ads in The New York Times and it is possible that Rav Avigdor Miller wrote them but there is no way either of them would have supported some of what goes.
Hertz Frankel, the one who organized the Satmar protests for the Satmar Rebbe wrote an article Misphca magazine saying that the Satmar Rebbe would have opposed some of the current Satmar methods of protesting. Three points he made that I remember were that the Satmar Rebbe only supported public protests in front of non-Jews if (1)there was a specific issue that was being demanded of the Zionists. He did not make general protests or put general ads to educate non-Jews about Satmar haskafa and beliefs (2)He was not dismissive of criticism from other groups about those type of ads and protests . He did not like making public protests if no one other than he and others in the Satmar orbit felt they were correct (3)questions like should a protest be public pr private were things he put major thought into. He never ran to lash out in public.
Rav Avigdor Miller was no frothing at the mouth anti-Zionist . I’ve heard many answers from him to questions about the state of Israel. He never gave the type of answers you would get in Satmar. Yes, he was opposed to Zionism. but similar to the way most Yeshivish rabbonim are