If one person thinks you're an asshole they might simply be wrong about you. If everyone in the world thinks you're an asshole then you, almost by definiton, are one.
There's a reason why there's a separate word in most languages for "anti-semitism" but not for "anti-italianism" or "anti-brasilianism".
There's a reason why there's a separate word in most languages for "anti-semitism" but not for "anti-italianism" or "anti-brasilianism".