>"Being European, I see in the American mentality this kind of way of thinking like "if he is poor is because he is lazy and didn't work hard enough, so he deserves to be poor and suffer"

Where do you "see" that?

I am curious have you visited America? Have you spoken to Americans that live in cities that have acute problems with homelessness? Have you visited those cities yourself?

I can assure you that what you "see" in the American mentality is not the predominant or prevailing view. Its actually quite a complicated problem that involves mental health, bad circumstances, social programs, drug addiction, child abuse and a host of other nuances. Its very easy to over simplify from an ocean away though.