[psychoslave]

There are no real historical conflict between mysticism and science. Take Russel's essay "Mysticism and logic" for example, Russel having evolved from a more Platonist point of view to a more atheist materialist one over its long lifespan, inventing "neutral monism" on the road.

However there are clear possibility of conflicts between scientific approach and institutional religions. Note that people don't need to be anything close to an atheist to get into trouble when their thoughts are going out of the road promoted by the institutional dogma of the day. Giordano Bruno is one famous case of such a human drama.

Of course religion here is more the mean of political control than anything else, and it can be substituted by other means just as detrimental to independent critical free thought.