Generally speaking if you know the persons intent and they are on topic...you just let it go. Easy...especially since the poster is known to also be a "Trinitarian Christian"...as you have named.
I do not know anyone's intent and top presume to do so is mind reading. That said, I'll let it go when the anti-Catholics shop trotting out the magnifying glass to examine the punctuation in Scripture and the Catechism in vain attempts to prove Catholicism errant.