They are a danger to the US and to US science. Science will go on with these lunatics. Europe and Japan will carry the torch. The major risk IMO is they may torpedo the conservative movement in the US.
Science appeals to the conservative mind. It's reality based, it sticks with what works, it rejects the debunked, and it produces results. Science is one of the precious few examples of rationality in human experience. Another example is the American Revolution, and so is the US Constitution. Rationality is the foundation of Western Civilization -- as vital as life and liberty.
The conservative movement is inherently rational, and won't be taken over by a fringe group. And that's what we do here in these threads -- we carry the torch of Civilization. The dems are almost all insane, so we should prevail.
It's already happened to some extent. I know many people who agree with conservatives on things like government regulation, gun control, taxes, marriage, etc., but they will always vote Democrat because of the "Republican War On Science."
Similarly, some people would vote GOP except that the GOP is perceived as the Segregationist Party.