Been many moons since I was concerned about diagramming sentences...
Actually, the text doesn't allow this interpretation. "God" is in the genitive case, but "pillar" and "ground" are in the nominative:
Although I don't disagree that God is genitive, I'd say it's pretty difficult to determine from the sentence structure where pillar and ground fit in...
If after God there was no comma, but an 'and', an 'or', or even a 'but', I can see where pillar and ground could be nominative...But there is a comma...
You may say that the 'original' doesn't have a comma...But I'd like to point out that without a comma, the sentence wouldn't be much of a sentence...AND, the Douay-Rheims bible, copied from the Vulgate has the exact wording and comma as the KJV...
In conclusion, I'd say the answer lies in the rest of the scripture...And I'd also says it's pretty conclusive that Jesus Christ is the 'ground' (the Chief Cornerstone, the Foundation,) of the church...That makes God the 'pillar' (stulos- a post (“style”), that is, (figuratively) support: - pillar.)...
Neither the Greek, nor the Vulgate for that matter, has commas (or even spaces for that matter). Punctuation wasn't invented yet.
From your comments you appear to be unfamiliar with the nature of the Greek language. In Greek (also in Latin), nouns are "declined" according to their case: they actually change in form. For instance, "theou" is the genitive form of "theos," God. Likewise, "ekklesia" (church) is a nominative, and so are "stulos" and "hedraio^ma." (pillar and foundation) If they weren't nominatives, but rather genitives agreeing with "theou," they'd have a different word-form.
AND, the Douay-Rheims bible, copied from the Vulgate has the exact wording and comma as the KJV...
Rheims note/commentary on 1 Tim. 3:15:
15 "The pillar and ground of the truth"... Therefore the church of the living God can never uphold error, nor bring in corruptions, superstition, or idolatry.
LOL! The CHURCH IS Christ physically manifested in the world today. You can't separate Christ from the Church, since the Church IS the Body of Christ! Thus, as you say, the rest of Scripture tell us that the Church ALSO is the pillar and ground of truth
How about: "I am the way, the truth, and the life" says Christ.
Regards