Your question presupposes a few key points:
- that Germans are more anti-Semitic than other groups,
- that Germans are more warmongering than other groups,
- and that the early Germanic tribes were more murderous than other groups,
then asks if points 1 and 2 lead to point 3.
Almost certainly, the answer is no, that modern-day Germans have not inherited these sorts of bad attributes from their ancestors. I'll try to address a few of the reasons why.
Anti-Semitism is not a particularly German attribute.
The Holocaust, while larger in scope than previous actions against the Jewish people, was not an entirely unique event in history. Many countries have a very long history of attacks and discrimination against Jews, including centuries of pogroms, expulsions, wholesale murder, arson, and discrimination of many kinds.
Warmongering is not a particularly German attribute.
Germany, over the course of centuries, is not necessarily more warlike than other regions. In the 20th century alone, you have Japan and the USSR conquering large swaths of territory, and massive wars in the Congo and other parts of Africa that are rarely remarked on. Germany's prominence in the history of war is largely due to the recency and technological level of its last two wars. Looking at the entire period from ancient Germania to the present day (as your question does), Germany has only been a small part of the total warmongering going on.
The early Germanic tribes were not necessarily any more murderous than other tribes.
Were the early Germans more warlike than the Celts, Romans, Huns, or any other groups of their day? They were certainly successful in a certain region, for a certain period of time, and they certainly had to use warfare to be so, but the same could be said for many of their neighbors. Hard data will be hard to come by, this far removed in time, but plenty of stories of the viciousness of many groups can still be found.
Bad behavior is not known to be heritable over thousands of years.
Even if the three points above were proven, the connection between them would still be tenuous at best. The behavior of a group can change wildly over thousands of years. Consider modern Mongols versus those in the days of Genghis Khan. Consider groups like ISIS in present-day Iraq versus Baghdad at the height of the Caliphate.