I guess the Jews also deny it but for some reason there's not as much fear and loathing about them. There are also probably other "Christian" denominations who exlicitly or implicitly deny this would be my guess.
Well, duh.
(Believe me, I really didn’t want to say “duh”, but the shoe fits.)
Jewish people don’t try to fool people into thinking they are Christians.
“There are also probably other “Christian” denominations”
.... Yeah, they’re called heretics, cults, apostates, etc.