I grew up in the 80s. I'm not talking about any recent attitudes. The jokes of my childhood, that trickled down from parents to the playground, ranged from chauvinistic to casually racists to vile slurs. The most common ones were about 'a Pole, a Ruskie and a German', with the Pole coming off invariably superior in every respect. I actually asked around, and everybody I talked to knows them, and agrees that they were around since at least the WWII.
If anything, I'd say these attitudes are being gradually eroded thanks to the society getting more open, affluent, and worldly (and the older generations dying out). That a quite large percentage of the society had a chance to live abroad after the transformation, and experience being the butt of the jokes, probably contributed to some newfound humility. But it still resurfaces in casual conversations even among people that should be more sophisticated than that.
Also, we aren't really getting any noticeable amounts of refugees here.