GRIN! Happy laughter and comic-book joy! I love you and want to do all your lettering and coloring!
Those are, though, as you acknowledge, bands, not individuals. That would be more analogous to the Avengers or the Justice League having an ever-changing roster of members, which has been going on since the very beginning of both groups. That doesn’t seem quite as odd to me as having an individual hero adopt the name of a previous hero.
There was a recent subplot in a Marvel book where Deadpool starts up a mercenary organization named “Heroes for Hire,” and is hit with a cease-and-desist from Luke Cage.
Also, just sort of hit in general. With fists. Luke Cage is not a Deadpool fan.
Espirita/Firebird (Bonita Juarez) is evangelical, yeah? :checks Wikipedia: Wikipedia says she’s Catholic, but she’s pretty seriously Christian, anyway.
John ‘USAgent’ Walker might be evangelical, although he’s more of a political/cultural conservative. (Granted he’s also the ‘dumb one’ in the Captain America family, but he’s basically a good guy.)
Rahne Sinclair was raised in some kind of intense Calvinist background, I think. That’s not presented as a good thing, but as someone with a pretty religious background, I still find that identifiable; a lot of preacher types in real life *are *abusive creeps.
Some characters, like Spider-Man, have deliberately unstated/vague religious backgrounds to increase reader identification.
Where that trope of ambiguity is averted, it may be used for drama, as with Rahne’s abusive upbringing.
But it is very often tied to ethnicity, as with Kamala Khan (Pakistani-American) or the various Jewish characters. Note that Kitty Pryde & Billy Kaplan are both clearly Jewish, but it’s not clear how observant they actually are. Kamala is a somewhat observant Muslim, but of what particular school or movement hasn’t been specified that I have seen.
Oh, there are a fair number of Catholics in comics, too, like Daredevil; but that may be largely because it’s a recognizable cultural tag.
And remember, Marvel is a deeply NYC company. There are rather more Jews and Catholics than in the heartland, and rather fewer evangelicals as such. And these days, NYC is getting a lot less white, too, which is reflected in books like Power Man and Iron Fist.
They’re musical acts touring under something other than one person’s name. Like someone else pointed out, there are multiple Captain Americas. but not multiple Steve Rogers. And in the real world, it’s completely routine for individuals to adopt the popular name of super heroes. Adam West, Michael Keaton, Val Kilmer, George Clooney, Christian Bale, and Ben Afflak have all played Batman, for example. They’re actors playing a role, but does demonstrate the idea of different people taking up a name, especially since most superheros don’t use their real name.
For at least some superheroes, there’s probably a “Dread Pirate Roberts” dynamic going on. Criminals are afraid of The Batman, and in fact that fear is one of the main tools in Wayne’s arsenal. If someone else has to take over Gotham-vigilante-duties, the job is going to go a lot better if that someone else is also The Batman.
This probably isn’t relevant for Captain America, though, who doesn’t wear a mask and is something of a public figure.
I’m curious about your reading, as it is very different from my own. You say he’s not “a real preacher”, but what does that mean? He preaches, and he preaches what he believes, what the combination of his own religious background, a complete ignorance of human neonatology and one of Chuck F Saviour’s oh-so-incredibly-bad speeches* led him to believe. He believes that mutants are the spawn of Satan and should be destroyed, and that’s what he preaches. How is he not “a real preacher”?
- I still want to know how the fuck is someone who’s supposed to read minds so incredibly bad at reading an audience.
…Captain America wears a mask…but is also something of a public figure.
Yeah, well, I don’t care what you say…Sean Connery is the *real *James Bond. 
You know, something seemed absurdly wrong to me about this but I couldn’t put my finger on it. But today it just clicked - there are more than 80,000 Elvis impersonators in the US. And while I was looking that up, I found a webpage where I can hire several dozen different Michael Jackson impersonators right in my own city. So I think there’s at least a hundred thousand counterexamples to your idea that people tend to identify themselves uniquely and not take on the name and persona for which someone else is known.
Now I see your problem.