Actually they're no so unrealistic, they were popular in the middle east.
unrealistic wasnt really the right word, i know claws can be used as a weapon, its just that i dont see any advantage claws have over a dagger or a sword ar any other standard weapon . . . claws do have some advantages but too many disadvantages to be considered a viable alternative
if they were popular anywhere its not the middle east, and instead of popular id rather use the word 'present' . . . claws werent popular anywhere