I would say at the point that it becomes obvious that a posters conservatism is founded on Rush rants and Hannity platitudes instead of the works of Hume, Locke, Mill, Burke, Jefferson, Madison, Hamilton, Voltaire, Montesqueau and scores of other enlightened classical thinkers who created the period known as enlightenment. William F. Buckley is one of the modern day members of that group. William Kristol and his bunch of neo-con writers like Victor David Hanson are not.
I guess I have to balance my conservatism with my pragmatism. I like Rush as well, if for nothing else he draws in the less educated masses (I hate putting it that way)towards basically conservative ideals. I don’t think we will ever obtain a purely conservative world like the philosophers you mentioned write on, just like the works of Marx never produced in it’s pure form (thank God).
Also in being a capitalist, I find myself a supporter of the US being involved in the world both in business and politically. I support the war in principal if not execution (and that saddens me to no end) because if we fail, perpetuation conservatism will be the least of our concerns because going to the grocery store could turn deadly.