As the KING of all the citizens of the UK and still some Commonwealth nations, he is kind and polite to people of ALL religions whom he reigns over, as the SYMBOLIC representation of head ( with virtually NO real powers! ) of those nations.
You don't really understand such things, I guess.
he is kind and polite to people of ALL religions whom he reigns over
Well, if so, why can't he be kind and polite to Christians, instead of bashing them, as he's spent most of the last 30 years doing.
You do realize, that as of 2018, only 12% of the U.K. were C of E. If it's over 10% today, it won't be much longer. And of that number, what percent is over 60 years old, and what percent is under 20?