DNA results don't match up with family history.
For context, my maternal grandfather is a man with MENA heritage. I don't know where exactly his family is from, or what exact DNA percentage he gets from this heritage, but he's a visibly brown man. Even at his lightest, his skintone is darker than the rest of our family or any other 'white' person I've met, and when he tans he's extremely dark. He also has a large nose, large eyebrows, very dark eyes and hair. When people see him they immediately perceive him as being non-white.
My other three grandparents, as far as I know, are white. I think two are Scottish and one is English. They're much more open about their ancestry than my maternal grandfather is.
This is what my DNA results look like:
I'm confused. None of the ancestry I know my grandfather has (which i've been told is significant mena ancestry + some italian and minor german heritage too) seems to show up in my DNA, but I don't know how that's possible? Isn't 25% of my DNA supposed to be from him? And we have confirmation from other dna testing that I am his biological granddaughter, so I'm just..confused. I was hoping to learn more about what culture he came from, since he never talks about it or taught us anything about it. Genealogical research seems to be a dead end for him too. I'm just..confused.
I don't know much about how DNa works, admittedly, or how ancestry calculates ethnicity, so I'm kind of lost?