The argument comparing the God of Abraham to a belief in faries appears weak
You can compare any two fictional entities and you will discover that what they all have in common is that though people might talk about them, one can never experience them through the senses. Believers are offended when their god is compared to any fictional character that they agree is fictional, whatever one chooses, be it Santa Claus, Superman, or fairies. Maybe it would be less offensive if one chose another god like Zeus or Odin. People believed in them as fervently as you do in your god.
The belief in the God of Abraham is founded in the life and Teachings of the Prophets of God. The historicity of Jesus and Muhammad for example has strong evidence. The influence of their Teachings on the course of human history and civilization is clear. The millions who have been positively affected by Jesus and Muhammad is impossible to ignore.
None of that supports a belief in the god they wrote of, meaning that that god is just as unevidenced as those fairies.
Nor is it an argument for religion. Great ideas don't come from religions. They come from geniuses, and religions don't generate those. They are born, and these days, they are increasingly less likely to be zealous believers. Those are made, not born.
But I believe to abandon religion entirely is to abandon the most powerful uniting force in the world. Religion unites billions of people. Whether Jew, Hindu, Buddhist, Muslim or Christian there has never been nor will ever be a more potent force to unite people than religion and I believe to ignore it a grave mistake.
My experience has been the opposite. The greatest achievement of modernity was the Enlightenment, which saw superstation, received morals, and the divine right of kings give way to science and the modern liberal democratic state with citizens and individual rights rather than subjects. And the same happened in my own life when I left faith and Christianity, and returned to reason, empiricism, and rational ethics (humanism). Religion is divisive. It is in the United States right now. It has been in these threads.
What else can we put in its place that can unite our world and bring peace to humanity? Humanism has great ideas but cannot unite humanity as the majority of the world believes in God. At best it can help better some conditions.
You're saying that theists are interfering with humanists. That is correct. So are authoritarians, plutocrats, and kleptocrats. Humanists oppose them all, but it's a struggle against those that would slow human progress and return to the good old days of kings' fortunes, serfdom, and theocracies.
Only through a teachings revealed by God for THIS AGE can a world torn by strife and conflict be transformed into a world civilisation and a golden age of peace and prosperity.
That's never worked before, and hasn't worked this time, either.
"Religion. It's given hope in a world torn apart by religion." - Jon Stewart
If it never occurred to them to do do then they would not have freedom of thought and they would be like programmed robots.
You're equating thoughts not occurring to robotic thinking. By your own definition, you're a robot. We all are. And please explain again what the downside is of only having good, kind, and pure thoughts, and why a tri-omni deity should opt against that.
Our minds are programs that evolve with learning and forgetting. The hardware is the collection of neurons and their myriad and dynamic interconnections and electrochemical activity comprise the software. Your choices are limited to what those mechanisms can conceive and deliver to consciousness for consideration by the self. Our brains are unique in their possession of an intellectual faculty, which confers reasoning and symbolic thought (language and mathematics) capabilities. This is more than mere intelligence, which is the ability to identify and solve problems, and which the beast possess.
As a result, man has an extra voice in the mix at times contradicting the animal instinct or impulse arising from lower centers. These two voices are classically depicted as a devil and an anger sitting on one's shoulder and arguing through the earholes with one another. This is an accident of evolution, and a stage in it. If man survives long enough, he will gain progressively more control over those impulses. He will learn to silence the beast in him. Some already have to a great degree, almost all to some degree. When is raging a good choice? There can't be many times when having the free will to do that is a good thing.
Would it improve your life if you were programmed to believe in God instead of having a choice to do so?
If that were a good decision in every case, then yes. You don't see the problem with your line of argumentation here? You and I have made opposite decisions in that matter. If one choice were better than the other, one of us made a mistake. I still can't find value in arguments that posit that being able to make bad or cruel choices makes the world a better place as we would expect were it ruled by a tri-omni deity.
There is no free will (the same as we have it here) in the next world, aka heaven.
However you answered would reveal an inconsistency in the claim that God prefers that man have free will on earth and that heaven will be paradise, because man with free will sins in the Abrahamic vernacular, and that is an abomination intolerable to God. What are God's options here but to remove that free will and create that robot after all?