Since I have never said science was a religion, I will assume you are talking about someone else.
Science is only as rigorous and honest as those who engage in it. Science tells us nothing. Scientists are the ones that relay to the general public what they believe their findings signify.
I am arguing against the belief that scientists are totally objective and free from bias. I am arguing against the belief that scientists are fundamentally different than every other human being in that they engage in their work free of presuppositions.
The method is like any other thing subject to use by humans. It can be used correctly, or abused.
Science by nature is reliable in the sense that it only seeks to examine the physical, natural, observable world that is subject to investigation via empirical means.
Science by nature is subject to abuse in that those who engage in it are prone, like in any other aspect, to interpret data according to their presuppositions.
Whenever scientists overstep their bounds and begin making authoritative pronouncements on domains outside of their area of expertise, they are abusing science and using their mantle of authority to cloak this from the unaware public.