Actually, the reason for all the similarities is because nepotistic despots all tend to follow the same playbook.

But the people for whom the book of revelation was written knew it was speaking of Nero. When his name was translated to Hebrew and Gemara applied to get a number it comes out as 666. Or 616, in the contemporary Greek translation, since Nero Kaiser is pronounced Neron Kaiser.

There was also the cult that believed Nero returned from the dead (Nero Redivivus).

It should be noted that all prophetic works are messages to people in a time and place, and understanding them requires understanding those people. Much of what modern christians now say about is little more than copium scraped off the wall.

Jesus said he’d return and then do all the messianic things he didn’t do the first time.

Then jesus didn’t come back because he was preparing for a war.

Then Jesus didn’t comeback because he was fighting that war. Then all the disciples died and it just started getting weird from there