“Sources please.”
Find them on your own. Many good encyclopedias will tell you the approximate number of Christians was about 1 million in A.D. 90.
Google is your friend.
Don’t be lazy.
If you make a claim, back it up yourself and don’t expect everyone to take what you say simply on your say so or do your work for you, chasing down stuff they don’t even believe.
If you refuse to provide sources, everyone has every reason to dismiss what you say as nonsense and nothing more than your opinion.
You made the statement...you back it up. Vlad’s Rules of Internet debate are in play.