All I can tell you really is if you get to the point where someone is telling you that you are not great or not good enough, just follow your heart and don't let anybody crush your dream.
“Finding the right form of debate regarding Israeli policies will remain a challenge in Germany. Even with every conceivable and warranted criticism, the danger always arises that it will be exploited by those who consciously or unconsciously present anti-Semitism in a new guise.”