Shorter David Brooks, "The G.O.P. Rejects Conservatism", New York Times, June 27 2017:
No true conservative would contemplate eliminating the Affordable Care Act without providing some alternative way of getting people health care, because many conservative intellectuals are now kind-hearted folk and believers in income redistribution, just not liberal income redistribution but a more modest and gentle type that doesn't actually redistribute the income, like allowing tax-free health savings accounts, surely people who can't afford decent health insurance would be able to put together a couple of hundred thousand for an emergency if they didn't have to pay all those bloody taxes amirite? And reducing regulations and using market incentives [ed.: Market incentives without regulations?]. Etc. Therefore, Republican Senators are no true conservatives but beastly individualists, as Prophet Tocqueville spake it in the ancient sacred book.
The No True Scotsman fallacy is when you make your point by quietly changing the definition of a primary term to exclude the case you don't like. "No true conservative would support a health plan condemning tens of millions to sickness and impoverishment, because that's what Yuval Levin and I decided the other day."
Imagine Hamish McDonald, a Scotsman, sitting down with his Glasgow Morning Herald and seeing an article about how the "Brighton Sex Maniac Strikes Again". Hamish is shocked and declares that "No Scotsman would do such a thing." The next day he sits down to read his Glasgow Morning Herald again; and, this time, finds an article about an Aberdeen man whose brutal actions make the Brighton sex maniac seem almost gentlemanly. This fact shows that Hamish was wrong in his opinion, but is he going to admit this? Not likely. This time he says: "No true Scotsman would do such a thing." (Antony Flew, 1975, via Wikipedia)
"Conservative" is, in the perfectly adequate American Heritage definition,
disposed to preserve existing conditions, institutions, etc., or to restore traditional ones, and to limit change.
It doesn't say anything about a tendency "to have accepted the fact that American society is coming apart and that measures need to be taken to assist the working class" or "a vision for how they want American society to be in the 21st century". These are neither conservative nor non-conservative (you could use them to call for a socialist revolution, if you wanted to do that in such a dreary tone), they are simply thoughts that make Brooks feel good about himself.