I don't think religion or religious practice should be outright banned, because that would be the quickest way to start a new civil war in most countries. But I do 100% believe that religious practice should be stripped of most of its legal "protections", primarily the ones that let them get away with blatant hate speech. You can practice your religion in your own time, but that doesn't mean you can bash gays publicly, or use it to fuel racism or any other kind of bigotry on a public scale. That should be strictly illegal.
In America, we have this thing called freedom of speech. A lot of uninformed folks like to interpret this as the ability to get away with saying anything in public as long as you cry "FREEDOM OF SPEECH", but it's not. You still must suffer the consequences of saying stupid, ignorant, vitriolic things in public. The freedom of religion should be the same way. Unfortunately, things like the Red Scare and, of course, more recently terrorism, which has been painted in the media as being an entirely Islamic affair, have made efforts to weaponize Christianity vastly more successful, and as a result they have reaped the benefits of a multitude of legal protections that they do not even begin to deserve. The best way to secularize the US would be to actually follow the words of the founding fathers and to remove the protections that they have been enshrined with.
In my opinion, the Christian consensus is just as much of a terrorist group as "Islam" (i.e., the radicals who are actually terrorists, not ALL Islamic peoples). The only difference is that one uses guns and bombs, the other uses bigotry and emotional warfare. And I would much rather be blown up than forced into a "de-gaying" clinic, because at least getting blown up isn't de-humanizing.