The Bible records miracles such as resurrections, angels, prophecy and destructive acts of God to mention a few. Are these all a pack of lies?
Lies. Misgivings. Credulity. Who knows? Just because a book says something, doesn't make it true. Especially when there is no conclusive evidence.
It's a big grift that religious leaders, including Watchtower Corporation(tm) are using to exploit people for money and power.
How do you explain them?
I don't. No more than I explain any story from yonks ago. Did King Arthur or Robin Hood actually exist?
I am convinced they happened.
Good for you. Some of us are more sceptical.
The reason to be sceptical of claims is indeed the example of the Shirdi Sai Baba grift.