Indeed, but the problem is rooted in the nature of a political party: It exists for one and only one reason: to get its candidates into office. In eras when party A is dominant, the other major party -- there are never more than two -- will emulate it in every possible way.
Conservatives' mistake is relying on the GOP to persuade Americans away from left-liberalism. It's just not the right tool for the job. We need to emphasize other approaches -- many of them -- until we find ones that work. After that, the political landscape will change on its own.