In other words, you have no idea what the "No true Scotsman" fallacy is.
I know exactly what the 'No true Scotsman' fallacy is.
The key is that you are
born a Scotsman. Arguably you can naturalize as a citizen to become a Scotsman. It's a fallacy to say 'No true Scotsman will X,' because being a Scotsman is
not dependent upon doing or not doing any given action, except for perhaps renouncing Scottish citizenship.
You are or are not a member of an
ideological movement based on whether or not you pursue those ideals. It is therefore true to say that 'No true conservative believes in Big Government,' because one of the
core founding principles which Conservatism
exists to conserve, is the principle of limited government.
And yes, the nation was also founded on Christian morality, part of conservatism is conserving that too. You can be conservative adjacent, a conservative-leaning libertarian, etc, etc, but if you outright reject Christian morality, you are rejecting one of the core tenets of American Conservatism.
Maybe possibly you could still be considered more conservative than not if you hold to all the other tenets, but if you don't believe in limited government
or Christian morality, you're
definitely not an American Conservative.
I'll remind you all that even though Thomas Jefferson didn't believe in miracles, and thus much of the Bible, he still believed in Christian morality, its essential nature for a functional nation, and attended church because he believed as a community leader he had to set an example of what morality he wanted the community to adhere to.