That's why God speaking from the clouds is a better idea.
And just how would God speak to all 7.8 billion people in the world from the sky?
Would God circumnavigate the globe until the whole earth was covered?
Baha'u'llah wrote 15,000 tablets over the course of 40 years.....
Would God drop all the teachings and Laws that the Messenger reveals down from the sky and hope that all of the 7.8 billion people in the world will catch a copy of all these tablets? How would anyone know that God dropped them?
Of course if all you care about is knowing that God exists the booming voice might work to accomplish that, God willing, but what is the point of knowing God exists unless you know something about God and what God wants for humans?
What do you think an alien is? Something not from Earth. Is God from planet earth? If not, then by definition God is an alien from outer space.
Logically speaking, just because God is not something on Earth that does not mean that God is an alien from outer space.
Heavens Gate sacrificed all that they had; even their lives! Just because you make great sacrifice does not mean you speak the truth.
Of course one thing does not mean someone was a Messenger of God. There would be many criteria that would have to be met. I don't know if I already posted this to you:
Please bear in mind that the following criteria are
my criteria which is based upon who I believe were Messengers of God, who met all these criteria. My criteria narrow the playing field and it will eliminate most claimants, since they will fail to meet all the criteria.
The minimum criteria would be:
1. He had good character as exemplified by his qualities such as love, mercy, kindness, truth, justice, benevolence, gracious, merciful, righteous, forgiving, patient.
2. He believed he had been given a mission by God and did everything he could to see that it was carried out. He was completely successful before his death, and he accomplished everything that he set out to do.
3. He wrote much about God and God's purpose for humans both individually and collectively, or scriptures were written by others who spoke for him. He firmly believed that the work he was doing was for the Cause of God.
4. He had many followers while he was alive, and there are still millions who follow his teachings and gather in groups based on the religion he founded.
5. His followers have grown more numerous in recent times.
This is a starting point but there are other questions we would want to ask ourselves before we would be able to believe that a man was a true Messenger of God because that is a bold claim so there should be a lot of evidence to support such a claim.
Other criteria he would have to meet is that his religion could not contradict or be in opposition to any of the world religions that are already established and he could not talk down any of those religions and say his religion is the only true religion from God.