Joseph Smith didn't discover gold plates. He was led to them by an angel sent by God. The question of whether a decendant of inhabitants of Jerusalem could have buried some modified Egyption writings in North America 1000+ years before Joseph was born... that question is kind of small when considering if there is a God and if any such God takes a direct interest in individual people.
FWIW, I happen to believe that there is a God and that God cares very much about you.
Now, about that bridge...