Thats the real objection. Do unto others as you would have them do unto you - the so-called “golden rule” - is by no means exclusive to Christianity, but Easter is a Christian festival where the emphasis should be on Christianity. Why then does he feel the need to bring other religions “take” in on it? I wouldnt mind so much except that, as you rightly point out, he never does the reverse.
“...but Easter is a Christian festival...”
Easter is a HOLYDAY, not a festival.