The founders did not establish government to enforce any one religious morality. There is no enumerated power listed in the Constitution giving them that ability. Therefore its not in their wheelhouse.
Now, also, they lived in a time where almost everyone in America was some form of Christianity, and the states themselves had state endorsed denominations, and the state governors would give religious proclamations on certain occasions, but they depended on the religious powers that were, to give the citizens moral foundations and encourage morality they thought was proper.
Its not govt’s role to push religious morality. Govt needs to get out of the way of religions to do that. Go t isn’t equipped to do it.
The interpretation of the courts regarding both religion and morality has been awash with careless thinking.
The Declaration of Independence mentions God several times, and the Constitution is based on its principles.
There is no viable Constitutional argument favoring pornography. Not in the letter of the law, nor in the spirit.
The arguments for banning pornography are extremely simple.