We're not alone

Why it's so hard for the humans believe we're not alone in this VAST UNIVERSE?? Why humans draw on the caves and in different regions pictures of humanoids or aliens?? Why its so hard for us humans to understand we are just part of something bigger?? Why some humans believe in "GODS" ?? Could this "GODS " be extraterrestrial?? Why it's so hard to believe?? I'm a peaceful human searching for the REAL TRUTH about us and about Life and it's mysteries !!! WHY ITS SO HARD TO BELIEVE?? WHY THEY HIDE THE TRUTH?? WE MUST PUSH THEM (GOVERNMENT, RELIGION...) TO THE LIMIT!!! WE DEMAND FULL DISCLOSURE RIGHT NOW!!! ITS ABOUT TIME WE HAVE ANSWERS..