EVERYONE who believes in Hashem, believes that 'זה היום עשה ה - the argument is if נגילה ונשמחה בו.
Almost everybody already has an opinion. You won't change their minds. "The Gedolim didn't like the Medinah!!" "How can you not appreciate this incredible miracle??!!!" It will only frustrate you if you try. So better use your powers of communication to learn Toras Hashem.
