This is exacerbated by the fact that, due to the inundation of America with unsavory characters, we are a nation that is at odds with itself in terms of demographics. The white man has different values than the black man, and the red man, and the yellow man, and the pink man, etc.
What I meant regarding the collision of cultures was that people allowed for too much interconnection between races/ethnicities which resulted in a society where none of the participants can be truly happy.
To say that a people and their values can be so malleable that they should not be preserved is a dangerous path to tread.

No tech that would not have existed in 1944
No weapons that would not have been allowed in a real war. (Even special forces are not allowed wield a katana in a war, though they often can choose their own firearms within reason)
Hentai tho. That's like finding out the fisherman's favorite seafood is Long John Silvers.
^ I find it extremely interesting that someone who works in the dating industry is willing to openly admit that they need help finding good cartoon porn.