Thomas has a significant (and VERY literate) interest in early Christians (hence his username), who were diverse in ways impossible to imagine in modern Christianity. And I think this is an invaluable source of understanding about where modern Christianity came from.
That said, the word Christian in the 100 AD context is NOT the same word as in the 2008 AD context. It's a historical belief system from a time with more diverse beliefs. But there are no more ebionites or gnostics. Someone can identify with the ebionites and call themselves that, but frankly that's a fringy solipsistic thing and it's not what Christianity contains anymore. Just as there are no more Jewish temple priests, no more sagisees and pharisees, etc.
Incidentally, I doubt that any early Christian belief system denied the
divinity of Jesus
whatever way you define that word.
Early Christianity - Wikipedia, the free encyclopedia