Erm, 'religion is the root of all evil' is not a conspiracy theory. It's an opinion. On the other hand, 'Opus Dei systematically murders its political opponents' (with convoluted points made to attempt to prove it) is a conspiracy theory. But then, 'Opus Dei is a nutty, slightly secretive rightwing Catholic organisation' is back in the realm of opinion.
To dismiss opinion as conspiracy is cheap politicking.
And to deny people the right to have anything but positive opinions of religion is oppressive. If you want to allow your life to be dictated by an imaginary friend, that's absolutely fine and is your right. To then try to impose such a medieval worldview on others whether they want it or not (an most monotheists are seemingly compelled to do) simply isn't on. Religion may not be the root of all evil but neither is it the root of all good, and it can't half make you gag when it's repeatedly rammed down your throat.
For a secular society where all religious and non religious views are tolerated and given equal status (i.e. no more presidential fricking prayer breakfasts and invoking Jesus at election time!)!