Why can't Americans be like the British instead of moaning,if a Brit ordered a pizza with no mushrooms and saw?

mushrooms being added,we'd think,i'll pick them out after,an American would say"YOU DEAF,I SAID NO MUSHROOMS,DON'T YOU UNDERSTAND ENGLISH,IT MEANS NO MUSHROOMS AS IN DON'T GIVE ME MUSHROOMS,SHALL I COME AND MAKE IT MYSELF,SHEESH MAN,LIFE WAS SO SIMPLE,UNTIL I MET YOU