Is this some sort of remnant of evangelical puritan protestant ideology?
I don't understaun this.
If you ask me, it'd make as much sense as Orthodox and Christians.... or Shia and Muslim...
I know not all Christians are Catholics but for feck's sake...
They're all Christians to me....
Edit:
It's a U.S thing but this is the sort of things I hear...
https://www.gotquestions.org/Catholic-Christian.html
I am a Catholic. Why should I consider becoming a Christian?
I now know more distinctions (apparently Catholicism requires duty and salvation is process, unlike Protestantism?) but I still think they're of a similar branch (Christianity) so I just wonder the social factor
This is true about El.
I don't remember if YHWH is associated with Assyrian culture though.
But if anyone is interested, I recommend reading Mark S. Smith's The Early History of God. It's very dry and dense, but extremely informative.
I didn't mean to imply a relation between YHWH and Assyria, but rather link the Assyrian culture of appending god names to important figures' names and the Canaanite culture of appending "-el" to indicate allegiance.