"So were our Founders who had laws against pornogrpahy and prostitution simply variants of Marxists?"
Not at all, "radical", but the founding fathers were wise men, not all-perfect gods. Even very good people are capable of very bad ideas. It was extremely hypocritical of the founding fathers to legislate their morality at the expense of other consenting adults while preaching the freedom and individual liberty that made it's way into the greatest national document (however imperfect) man has yet devised--the Constitution.
They were wrong here, and so are you.