the issue with "facts", unless they are "scientifically" proven, there is not really a way to make it a fact! ... and even then perspective has a great influence on it.... on top of that everything always changes, change is the only true constant is what they say! so a fact you have today, may not be true tomorrow! what then?
I don't have it with religion either

though i think, if they had to stay with the "facts" there wouldn't be much to stay with

... as much as i don't choose religion for myself, i see how much "good" it can do to others, mainly to those who do NOT question...cause while they don't question, they surrender, and surrender can work the magick
so, is there a line to draw? to a degree i guess you can, but everything is so individual, drawing a line couldn't live up to the "truth" either .... if we want to draw a line, imo, we can only do it to ourselves personal, we cannot account for anybody else, nor expect them to follow "our" line