Maybe this article on the difference between VINCIBLE and INVINCIBLE ignorance can help:
http://www.newadvent.org/cathen/07648a.htm
Thanks. Reading that piece actually helped me to remember two Bible verses that I’d always been fond of.
Deuteronmy 4:19...And lest thou lift up thine eyes unto heaven, and when thou seest the sun, and the moon, and the stars, even all the host of heaven, shouldest be driven to worship them, and serve them, which the LORD thy God hath divided unto all nations under the whole heaven.
and
Malachi 1:11...For from the rising of the sun even unto the going down of the same my name shall be great among the Gentiles; and in every place incense shall be offered unto my name, and a pure offering: for my name shall be great among the heathen, saith the LORD of hosts.
All good....