It seemed to me that in his original three articles he failed to distinguish between matters of first importance regarding doctrine and polity and the reality of adiaphora, especially as the proclamation of the gospel crosses cultural bounds. Hence his equating the political debates around illegal immigration with justification by faith, trivializing the latter, as you pointed out.

I share Matt Tuiniga’s concern (in comments on Dr. Gleason’s second response) that Gleason’s original article could alienate younger reformed PCA folk.  I’m praying that doesn’t happen, but that we’re able to grow in unity within the PCA and across other evangelical and reformed denominations around the whole council of God’s word.  North America’s cities, towns, and villages are full of people who need Christ and the riches of his sovereign grace now more than ever.