You're not even comparing apples and oranges, you're comparing apples and lumps of coal. Publishing on the Internet or a handcranked printing press are essentially the same.
The right to sodomy did not exist when this country was founded and it does not exist now.
What you are espousing is called social Darwinism, moral relativity. It is the "absolute truth" of saying that there Is No Absolute Truth.
. As society expands, so does its understanding of the law.
In other words, as society devolves, what is accepted as normal degrades to include more and more repellent and vicious behaviors.
So if tomorrow or the next year or next decade necrophilia gains a significant following, that can be mandated into a legally protected act because "we're not in the 20th century."