Your post is simply an extended argument from authority. Sure, Galilei, Descartes, and Copernicus believed in Christian god, but it doesn't mean anything except that they couldn't explain some stuff and used the concept of god to fill the holes in their knowledge. (Ironically, I just watched Neil deGrasse Tyson talking about these guys and their god of the gaps beliefs.)
I've learned the hard way that it's the facts that matter, not opinions.
Thank you for the comment! Nevertheless, the proposition of the article is vastly different from one that appeals to authority. Argument from authority means substantiating a conclusion base on the endorsement of (often irrelevant) authorities. (e.g. Galilei believes in Christianity, therefore Christianity is correct). However, my post merely argued for Christianity WORTH ATTENTION because many esteemed and intelligent individuals believe in it. This is different from saying Christianity is true, thus my post doesn'tconstitute the appeal to authority fallacy.