Throughout his column, Douthat speaks of how libertarian values restrain fascism--they do. To equate them with conservative ideology, however, is a bit of stretch. Conservatives are not libertarians. Conservatism is not the ally of liberty. It is first and foremost the ally of the status quo and the past. Every attempt to expand human liberty was opposed by conservatives of the day.
We inhabit a small moment in time in a Church that has endured for 2,000 years and shall endure for many thousands more. The Church will not be shaken to the core if the divorced and remarried are admitted to Holy Communion. It would be nothing more than the practical working out of the Church's commitment to mercy.