Margaret Thatcher's quote was regarding environmentalism, which you claim is anathema to true conservatism. And, FWIW, Buchanan's view on war, including what he thinks was our wrong decision to enter WW2, may not be pacifist, but he is very, very much against the use of the US military for anything other than self defense.
Shall I try a three-minute Google search to find a couple of conservative secularists/atheists?
You don't get it. I said environmentalist, peace activist, AND secularist.
Not- environmentalist, peace activist, OR secularist.
Of course there are republicans/conservatives who embrace certain major ideas of liberal philosophy. Hell, I'm against the death penalty and think the Iraq was a huge mistake. Does that make me a liberal? Fuck No.
And yes, try and find one republican/conservative who fits the criteria I mentioned. You'll be wasting your time. You know why? They don't exist because they're called liberals.