Romans didn't like germans

Tacitus' descriptions of the Germaniccharacter are at times favorable in contrast to the opinions of the Romans of his day. He holds the strict monogamy and chastity of Germanic marriage customs worthy of the highest praise, in contrast to what he saw as the vice and immorality rampant in Roman society of his day (ch. 18), and he admires their open hospitality, their simplicity, and their bravery in battle. All of these traits were highlighted perhaps because of their similarity to idealized Roman virtues. One should not, however, think that Tacitus' portrayal of Germanic customs is entirely favorable; he notes a tendency in the Germanic people for what he saw as their habitual drunkenness, laziness, and barbarism, among other traits

http://en.m.wikipedia.org/wiki/Germania_(book)