Lol what the fuck are you talking about? Jews took on common names in the places they settled in in order to blend in. Miller is an occupational surname meaning someone who ran or worked at a mill. But it is well known that Miller is also a common jewish surname. It doesn't matter what "Fuentes" actually means in Spanish, genius. The surname doesn't have to literally mean "jewish" in order for it to be a jewish name.
These people are idiots.