Same here P-hole ... I've told people Merry Christmas all my life ... NEVER once has anybody protested. I, like you, believe it's all media hype.
When I had my business, I sent Christmas cards to all my customers unless I knew they were Jewish, then I sent Hanukkah cards. I'm sure I screwed up a time or two not knowing, but to my knowledge, I never lost a customer ... and never had a complaint.