You are ignoring the Constitution's Supremacy clause which outlaws all supremacisms (and it didn't say Islam was an exception)YOU undermine Article 6, Section 2, part 1 which supercedes the 1st amendment.For one, the only crime punishable by death under the Constitution is treason. Second, the proposals of some in this thread will not only undermine the First Amendment, but also the Eighth Amendment.
The First Amendment exists for a reason. Congress shall make no law respecting the establishment of a religion or prohibiting the free exercise there of. This applies to both the federal and state levels.
"This Constitution, and the Laws of the United States ..., shall be the supreme Law of the Land;"
All it means is religion cannot supercede the Constitution. Nowhere does it say you cannot practice Islam or that Islam is banned. Practicing Islam is protected under the Constitution.
If mental gymnastics were a sport, every conservative in this country would be a gold medalist.