The idea of many religions, and ethnic groups of sticking to your own is not invalid, even though its negative aspect can lead to intolerance.
The collective (THEY) is not wrong, just as the collective (WE) is not right.
All humans have the same True needs (not Dr. Harleys). How they are met and satisfied is merely cultural, environmental conditioning. Stuff that is more of a OS as opposed to a EEPROM, for the techies. It is almost? impossible to navigate life without the OS, but it is possible to remove and install something different. Doing so leads to the typical frustraion and inabilty to accomplish tasks as efficiently, without practice. For information on messing with your EEPROM see your local diety, seek nirvana, or study biofeedback.
Children are able to change there OS well, for instance a Thai child being adopted and raised here. Their religion and social interactions and ideas of morality are completely different (NOT wrong) then an american Jew/Christian/Muslim. (The Yahweh triad I like to call it.)
My x came here when she was 10 from another country. She flip flops back in forth in her behaivioral patterns depending on her surrondings. Family vs. non family. As a behaivioralist student, practicer, I found it very fascinating. I am sure many here have seen what I speak of.
Some of Cobra and his W's problem (setting aside there own personal fears/issues that they each have) is not only are they opposites in personality, but their respective heritage's are completely different in the way they express emotion and way they look at family, and child rearing.
A Hispanic family dynamic is much different then a Japanese one.