All of your religions are equal to me, all claims to Truth equally valid. Admittedly, some are far more entertaining than others.
Problem:We want to build a bridge connecting two cliffs above a high canyon. How should it be built?
Answer 1. Build a bridge out of paper and string. According to my beliefs, that should be fine for any vehicle up to 20 tons.
Answer 2. Build a bridge out of steel-reinforced concrete. According to my beliefs, that should be good enough for cars and light trucks.
Answer 3. Don't bother with a bridge. According to my beliefs, the canyon is just an illusion. Just close your eyes and walk across.
Is anyone actually stupid enough to believe that in a real situation ALL of these "claims to truth" would be "equally valid"??
If so, you can demonstrate it. Since the "bridge" claim and the "illusion" claim are equally valid, next time you come to a bridge, walk or drive beside it, not on it. Perhaps then you will be taken a little more seriously. If you are not willing to do this, then perhaps you lack the courage of your "convictions."
The big difference here is that we have religionists telling me, the one who wants to build the bridge, that their way is best with absolutely no proof behind the claims. With your example, you can lump all the mysticists under Answer 1 who would build it out of matchsticks if their holy book told them that was the correct way. You can lump everyone else under Answer 2 because that answer has only sound engineering behind it, no mysticism.