The Hebrew, especially those you are referring to in Exodus, have walked away from a God who had just proven Himself through all of these miraculous acts. Even then they constantly denied God because they wanted God to meet their own tangible needs. (I guess you can say that they did not see the big picture.)
Many were blinding themselves with what they expected God to be, rather than accepting who He really is. That carried on to their rejection of God's promise to come down and deliver them in the flesh. They are still looking for a Savior with a rod and a sword to come down and "open up a can" on their behalf. What they never expected is what they have rejected, that He came down as a humble servant to make a way for all who would come to accept Him.
This flesh can be very blinding. That is more evident than ever today. This world wants to mold and make God into what is convenient for us. That is where man is absolutely unreliable to follow, hence the failure of religion. You replace what man wants with what God wants you will see a completely different picture.
There is something that we all must agree on. There is one Truth, one reality. We may not agree on what that may be, but with so many varieties being taught... ONLY ONE group is right. When we inevitably die, some are not going to be re-incarnated, some just turn into worm food, others at the feet of Jesus for eternity, and the others with 40 virgin wives... there is only ONE reality. No matter how much we really, really, really want our reality to be the one, it will not change what the truth really is. We can kid ourselves all we want, but that is simply the case. Who is right? We all think we are. Who wants to be wrong? Nobody, of course.
I am prepared to meet my fate when my life ends. I do not fear death, but I also do not deserve life-everlasting.
One last note... you all mean something and your life is precious to God. We are not mere accidents in an inevitable evolutionary dead end. I really pray someone out there is out there getting something from all of this. What more can a Savior do to get your attention. Amen.