No, you won't have any problem.
While such incidents remain extremely rare, there was an incident of that kind in Warsaw in March 2017, however.
A Greek man trying to get on a bus in Warsaw was pushed back by a group of young Polish men and next beaten up on a bus stop. As a result an ambulance was called in and took the victim to hospital. The attackers ran away immediately.
Despite their quick getaway, the police caught all the offenders in several days. There were seven of them aged: 20, 17, 21, 32, 24, 19, 23.
Are we entitled to say that those "true Polish patriots" were defending the (in)famous concept of "Polska dla Polaków" mentioned by Dirk in another thread?
Its about nationalism and standing up to israel/jews with a clear message - Polska dla Polakow!!!