Spiltz
Riviera de la Mancha
Spiltz
Why does YHWH only "communicate" with those who've already heard of him?
That has never been the case. Where did this come from?
Christianity is ALWAYS spread by means of humans. God never steps in and introduces himself. Look at Europeans discovering ANY country outside their neighborhood for a good example of entire civilizations living without any notion of YHWH.
Your sentence says, "Why does YHWH only "communicate" with those who've already heard of him?", which has nothing to do with some need for God to personally express Himself.
People have many religious views and, as have been argued, these could easily be skewed forms of the one true God. Just because it is not a literal carbon copy does not mean its not a possibility.