You are correct that Easter is pagan. No doubt about it. And, I appreciated reading the article you posted (Should Christians Observe Easter or the Passover?).
Some in the old testament worshiped the queen of heaven. And, many do to this day. Call it what they will. It doesn’t matter to God. Easter is pagan. Sola Scriptura is something Cronos knows nothing about and never will. Cronos will say “Nah, Bub, you’re wrong.” Pay no attention. You are correct.
You are correct that Pasqua (as the non-English world calls the pascal feast) is intrinsically Christian. No doubt about it.