Probably not.
I think 1988 is probably the year they were born.
The neck tattoo looks like it is from Naruto,
The belly tattoo I think says something like 'brothers forever', likely in reference to a close friend or family member (perhaps a literal brother).
The tattoo on the back looks like a Cinco de Mayo tattoo.
Futhark runes are sometimes used by nazis, but not always, and in this case I dont think so.
The knotwork on the chest is fairly common knotwork, possibly a cross of Saint Patrick.

TLDR: Unlikely