Gary has been around long enough that what he has written 30 years ago is now current again. Christian Reconstructionism was a movement that bothered a lot of people in the 1980s and 90s and today the boogeyman is Christian Nationalism. The arguments against both are nearly the same, even though Reconstruction and Nationalism aren't the same. What they actually have in common is bad and unbiblical critiques by authors who should know better. Read the article Gary is responding to here: https://www.christianpost.com/voices/the-rise-of-coerced-cultural-christianity-a-disturbing-trend.html