Direct interaction between Gods and men From the Mettanisamsa Sutta, one of the benefits of practising metta is that the Devas would protect him. This leads me to my question.

According to Buddhism and the suttas, do the Brahmas and Devas have any direct interaction with human beings? Please provide examples.

Are these interactions all positive or also negative?

Which ones are initiated by humans and which ones are initiated by Brahmas and Devas?

Could this explain some interactions between God and human prophets in other religions?

The God of the Old Testament sounds very much like the Mahabrahma of the Brahmajala Sutta:


  Then a certain being, due to the exhaustion of his life-span or the
  exhaustion of his merit, passes away from the Ābhassara plane and
  re-arises in the empty palace of Brahmā. There he dwells, mind made,
  feeding on rapture, self-luminous, moving through the air, abiding in
  glory. And he continues thus for a long, long period of time.
  
  "Then, as a result of dwelling there all alone for so long a time,
  there arises in him dissatisfaction and agitation, (and he yearns):
  'Oh, that other beings might come to this place!' Just at that moment,
  due to the exhaustion of their life-span or the exhaustion of their
  merit, certain other beings pass away from the Ābhassara plane and
  re-arise in the palace of Brahmā, in companionship with him. There
  they dwell, mind-made, feeding on rapture, self-luminous, moving
  through the air, abiding in glory. And they continue thus for a long,
  long period of time.
  
  Thereupon the being who re-arose there first thinks to himself: 'I am
  Brahmā, the Great Brahmā, the Vanquisher, the Unvanquished, the
  Universal Seer, the Wielder of Power, the Lord, the Maker and Creator,
  the Supreme Being, the Ordainer, the Almighty, the Father of all that
  are and are to be. And these beings have been created by me. What is
  the reason? Because first I made the wish: "Oh, that other beings
  might come to this place!" And after I made this resolution, now these
  beings have come.'
Your own thorough practice of Metta is your best protection. 
Being reborn in a God realm is not the goal in Dharma Practice. 
Leaving Samsara is the initial goal, and Buddhahood is the Ultimate Goal.
Gods and Devas also are within the rounds of Samsara.
As beings who take rebirth in the God realm also eventually have to leave that realm when their karma for that lofty position is finished.
Actually this human rebirth is the best for the full attainment of Enlightenment.  

Here is funny talk on just this topic.

https://www.youtube.com/watch?v=ibx_2nmHyV0&amp;feature=youtu.be&amp;t=960