"It shouldn't be taught in school alongside science."
This presumes science has proved, emperically, that someone can actually 'know' something. I'm sorry, but that proof doesn't exist.
Which means that science is itself is based upon a simple faith statement: we have to believe that when scientists say something is true, we know it is true.
Your words are perfect by the way: "It's a faith...".
I think it more to the point to say that when science demonstrates something through the scientific method, we have good reason to believe the experiment. No argument, though, that the scientific method is often overlooked.
OTOH,If I am not mistaken, evolution is taught as scientific theory rather than as truth.