> You can Google all these topics yourself for the proof.

What sort of a Google search might one do to determine in an epistemically sound way that there are no conservative positions that are supported by the relevant scientific research?

> Cutting taxes to grow the economy...

"Conservative positions are often/usually dumb/self-serving/deceitful/etc" and "no conservative positions that are supported by the relevant scientific research" are different claims.

> Any other issues of importance that I left out?

Yes: evidence of your initial claim. An admission that you were speaking speculatively/hyperbolically would suffice.