Have I seen it? No. Is it scary? I somehow doubt it. Horror movies from that are era are, in my opinion, not really scary. The best they can be is enjoyable or atmospheric. For example, films like “Nosferatu” (1922) Phantom of the Opera" (1925) Frankenstein (1931) Dracula (1931) Freaks (1932) The Old Dark House (1933) The Mummy (1933) The Wolfman (1941) and of course King Kong (1933) are considered classics in their own right, but I wouldn’t call any of them “scary” as in they frightened me when I watched them. Nonetheless they are very atmospheric and successful in creating a mood, although some of them are rather slow and dull by today’s standards (Lugosi’s version of “Dracula”–Karloff’s version of “The Mummy”-- and the James Whale film “The Old Dark House”). "Freaks is an interesting film, and it was banned in Britain for many years because it was considered so shocking for its time, but most contemporary audiences would look at it as an oddity rather than a horror film.
One silent film that does standout is the Lon Chaney, Sr. classic “The Unknown” from 1927. While it’s not a horror movie per se,it IS a macabre character study, and although the climactic scene at the end is rather disappointing, the rising action leading up to it STILL generates suspense and tension while it’s happening. My wife actually watched it with her hands covering her eyes, saying “They CAN’T show it happening! There was no CGI back then”
Even later favorites like “Creature From The Black Lagoon” “It Came From Outer Space”
“Them” “The Beast From 20,000 Fathoms” and my personal favorite: the original “Invasion Of The Body Snatchers” are NOT scary either, but they are FUN to watch.
We both enjoyed “Diabolique” and while that didn’t scare me, I certainly was glued to my seat the entire time trying to figure out what exactly was going on, and YES that climactic scene at the end was incredibly intense and atmospheric.