If you read the angel's interpretation of the vision, you'll see that the "Son Of Man" symbol or element represents the Tzadikim, or "Saints", those who keep YHWH's Law/Torah. The beasts are nations, empires, belonging to people who don't keep God's Law. The Tzadikim will rule over the nations. That's the literal, most accurate interpretation of the vision, according to the angel himself. Now if Christians want to project Jesus into the vision, making the Son of Man Jesus, and the Muslims project Muhammad, that's their prerogative. You can project whatever you want on the vision, I prefer the angel's clear interpretation.
The loud "horn", waging war against the Tzadikim, trying to change Torah or eliminate it, is Edom. The last empire, Rome, was connected to Paulianity/Christianity.