By your logic, the Founding Fathers went against Scripture in rebelling against the British government, primarily because they objected to the taxation policies of said authority.
Are you willing to advocate capital punishment for everyone who commits any sexual sin, such as looking at pornography ?
Jesus was a
capitalist, and would have endorsed the Founder's revolt against the British. "Render unto Caesar what is Caesar's" is if anything a capitalist statement, precisely because the profits one makes off of one's labor and land do not belong to Caesar. If you plan on citing Romans 13:1-2, please continue to read verse 3, which clarifies that the only valid governments are those which are "terrors to evil" (clearly, liberal/socialist governments would not be recognized as legitimate by Scripture).
It's difficult to prosecute people who look at pornography in their homes without unduly invading their privacy. That being said, people have the right to live in a society without smut being shoved down their throats, and I would heartily endorse prosecution of anyone who publicly produces, distributes, consumes, or promotes such filth. One example of a good position is this one.