It is outdated, irrelevant, and at this point, civilizationally destructive. John Wright explains:
The First Amendment was never anything but a cease-fire and peace treaty of a Christian v Christian civil war, which was extended, out of Christian charity and and English sense of fairplay and goodsportsmanship, to Jews and other religions.
It was never a suicide pact, never an invitation for socialists at home and soviets or Islamists abroad to overturn our system of protecting our God-given liberties.
The challenge is how to protect some semblance of free speech while strictly limiting, if not banning outright, the exercise of all non-Christian religions in Christendom. This is theoretically possible, as history demonstrates. But as events are rapidly demonstrating, in the current circumstances the latter is going to take precedence over the former.
The age of fairplay and goodsportsmanship is over. You don’t have to like it; I certainly don’t. Unfortunately, we have no choice but to accept it. And if you can’t bring yourself to do so now, don’t worry, you will soon enough.