This looks like a motte-and-bailey. Your original comment, the bailey: "he posted much religious stuff from official Intel accounts". This comment, the motte: "he posted much religious stuff".
You could've just said, "I thought it was extremely strange that he posted so much religious stuff while CEO". That would've been a very defensible position. You didn't need the false part of posting from official Intel accounts.
Or, if it was an honest mistake, you should've written something along the lines of: "Sorry, I misremembered, it was his personal accounts. But when you're a CEO, I don't think the distinction matters much; anything you post will be read as 'Intel's CEO says'".
Of all the openly religious people, Gelsinger did the least to mix business and religion. Whereas an irreligious person like Peter Thiel says some really wacky religious stuff.
Tim Cook is openly Christian and he has neither written a book about how “Jesus is his CEO” (and should be yours too) nor has he ever (to my knowledge) led his company in singing a hymn.
I didn't know about the book, but I'm finding nothing at all to indicate that he's ever lead employees in singing hymns. At Intel his boss was a secular Jewish man, and so was his CFO. That leads me to doubt that it ever happened especially not at Intel.
Based on my brief interactions with him, and my overall experience with Intel as a project partner at the time, I'd say he has exceptionally high integrity. I'd bet he didn't even have his books ghost written.
He definitely didn't have the book ghostwritten. It does have advice on issues that go beyond faith. But I think it's much more useful as a guide to the faithful than the non-faithful. We interviewed him last year about the book: