so when a scientist says global warming is real and man made, we shouldn't necessarily believe they know what they are talking about.. they may not be "applying science to everything that they believe". So, science is just what scientists believe or not.. like religious studies are to Theologians. same same.
Nope. Science isn't a population, it's a methodology.
Scientists are people who are more likely than others to apply that methodology. But scientists themselves will tell you (indeed, it's the motto of the Royal Society) - Take nobody's word for it.
If you want to apply science to a question, then that's rule number one.
Having faith in science is insane. Check it out for yourself.
If they don't tell you how to do that, they're not doing science.
If you find a theologian who takes pains to explain (in detail) how to prove them wrong, let me know. (Not holding my breath).
Nobody is asking you to believe in global warming (OK - lots of people are; but no scientists). The scientists are telling you it's happening, and how they know, and how to check it out for yourself.
If you don't bother to check it out for yourself, then you are not entitled to any opinion at all on the matter.
(Hint - checking it out for yourself doesn't include listening to others or trying to decide who to believe - it involves actually doing the experiments yourself).