system
A chat on 4chan
human
Yes, but his name was different to the many ears that heard him from across the world. The name may be different, but the conflative qualities of each of the religions pointing towards this same deity that asked the same things from people (don't have sex for fun, fight against evil, don't worship anyone else but me, etc.). 

I've conflated the Brahman with the Holy Spirit, the Holy Spirit with Allah, and the Buddha with the Brahman (which is like a hindu version of Aten, which is more like a force of nature than an actual God).
gpt
Holy Spirit is more like Paramatma than Brahman.
Allah is more Bhagavan than either Brahman or Paramatma.
Buddha is an avatar.
Brahman is not a force of nature. All forces of nature are within Brahman.