This is Ceasar Chavez on Easter Sunday. The ego of people at Google is larger than their intelligence. They don't understand when they turn people off by their "smart" decisions.
I had to google "Ceasar Chavez on Easter Sunday" to find out what you are talking about. Seems like a storm in an easter egg. I 100% see why google would prefer to celebrate a national hero instead of celebrating a religion that a portion of the population care about.
Chrome has 3.4B users. Safari has 1B. Edge has 212M. Firefox has 180M. Not that surprised a small unique page like this only supports the top two browsers.
I think whether or not it's intelligent depends their actual goal