That is a big assumption to make. I'm pretty down on the whole "faults of humanity" business. The whole notion that humanity is somehow "broken" is a falsehood propagated by religion. We are what we are. We are the products of our environment. We can either accept and deal with it or pine after unrealistic expectations we set for ourselves, however we need to understand all of that (those expectations) exists entirely in the human mind/imagination and has no real bearing in reality. If they won't talk to us because we're too nasty a piece of work for them then I cannot see that ever changing. Lions, Tigers, and Bears remain poor conversationalists to this day.
Sounds like the natural scheme of things to me. Animals experience emotion, are driven by instinct, and are prone to misunderstanding and confusion. That is just how things operate. So you think these things are god-like beings living a Utopian existence? Why? Because you imagine that would be what an advanced alien civilization would be like? Well if you are thinking god-like aliens are waiting for us to evolve into similar god-like beings who don't smoke, chew, or spit I think you're barking up the wrong tree. I think the true cause of the lack of communication is similar to the reasons why we don't get intelligible messages from jellyfish or carry on meaningful conversations with May-flys.
I think that depends a great deal on the nature of the contact. The world is "prepped" for alien contact and our expectations have been more or less set. I think what will happen is there will be initial glee over the whole thing by those who don't understand the sociological consequences of such contact. Those who understand the plight of the "discovered" will fear for the survival of our various human cultures. Those who think ET is a Utopian Space Guru of Love will lap it up and form cults and either worship them or whatever their gods might be.
I'm thinking that none of the various theories we have imagined will turn out to be true. It will be stranger than we can imagine if the truth of the matter ever sees the light of day. I have my doubts that it ever will. I think the real problem is that the phenomena is outside of our "design specifications" to fully perceive or comprehend.
We are broken, somewhat as a species, like surely here, the existence of Rapists and serial killers, inside a civilized society, is not acceptable,.Shouldn't we want to better or change ourselfs? Even if it does not fit the reality or the Environment we live in. Shouldn't we want to prevent wars and prevent hunger around the World. Everything is preventable with will and motivation. We are a self aware species, afterall, we should realise we do wrong and try to change, even if is just to better ourselfs. Blaming religion is a just a cope out, we can change, who we are, if we want to.
How do we know, there is lack of communication between Aliens and us? You have made assumption an Alien intelligence wouldn't communicate with us, because it be like, us trying to communicate or strike up a conversation with a Cow or Jellyfish. To be honest, i find that assumption puzzling.. Cows and Jellyfish, will never evolve, to become a space faring race ever. Well i don't get it lol >(can a Cow drive a Car) Some animals might survive a climate disaster better than us,but we have unique intelligence to learn and or intelligence is far superior to any known animal on this planet. The fact these beings do for the most part seem humanoid, we are too, they have been reported to have legs a body and a head (with a brain probably) So communication probably is achievable here and can happen, if they are similar to us, in lot of ways.
I don't imagine a God like race or Utopian race, I'm saying a Race from outside or Planet might have lead a different path (without the need for war) There race might be also less tuned to racism or hating, so upon coming upon us, they would observe, but avoid open contact, so to not disturb their ways ( therefore avoiding the clash of cultures) I'm not discounting the possibility of Races similar to us with a similar history coming here, and not giving a damn about us or the planet. But we do have to look at all angles of possibilities here.