This depends on your definition or "religious." Some people consider belief in *anything* religion, while some only apply it to belief in a god/deity/higher power.
depends of your definition of religion. Subjectively, members of a religion don't define the religion they are part of the same way you define a religion. If the religion they are part of is how you put it they would have left long ago.
If people cannot agree on how to define the word "religion" or "religious," there is no way for us to have any meaningful conversation about what is or isn't religion. Anyone could claim that anything is a religion. The word itself would be functionally useless, as it would have no fixed meaning.
People have died who otherwise wouldn't have if they had disobeyed Scientology's rules.The existence of Scientology has directly caused peoples unavoidable deaths.
Most religions have had people that have used their name or belief structure for killing (i.e. directly or indirectly through not seeking medical treatment), enslavement, or dehumanizing other religious faiths.