Scientology violently opposes psychiatry because of their belief in the importance of the human mind. Imagine a religion where the main belief has to do with the corruption of the mind by the world around you and that happiness is found in overcoming that oppression. The adherents in this case are deeply concerned that unhappy and enslaved minds will naturally try to enslave other minds and that this is the fundamental cause for all sorrow and war, etc. So if you try to discuss this with them in any confrontational way, the discussion only entrenches them more in the belief system.
My main concern with Scientology is this dynamic. Yes, they are trying to free their minds from the grasp of evil, but the path to knowledge is through a path that is not based on reason but on radical belief. Other religions have bad apples that are similar to this, and I would disagree with these as well, but by and large Scientologists are trying to make the world a better place. Protests like the kind “Anonymous” is doing won’t do anything to recover people from Scientology.
Freedom of religion means giving them their space. While I am nervous for the implications of Scientology’s effects on people, I must say that not allowing them their freedom to practice their religion is duplicitous. We all have opinions and beliefs, and those need to be protected regardless of their orthodoxy or heterodoxy.
That being said, my last point is that I personally disagree with the origins of Scientology. Its history is shady and needs more clarification before I can respect the religion as such. Those are my thoughts, to answer your question.