My mum works in a big supermarket so obviously serves many customers a day. Yesterday she said that 99% of polish people she serves are rude and ignorant, very much implying that this is how she feels about Polish people in general. She doesn't think there's anything wrong with this as it's just her opinion and got huffy with me when I said I don't want it said around my son. Is she being slightly racist or am I massively overreacting?