Without even considering real or supposed biological defects, blacks at least in the US are culturally debased beyond repair. So from there you get generations after generations of literal degenerates. They are also running on a "The more you're white the less you're black" mindset Which as a result gives birth to the opposite to "white traditional values" essentially. Look at the language they came up with (ebonics) look at the way they wear pants, look at their values. It reflects a systematic opposition to the host nation's traditional values and culture. That's how they define themselves, that's their identity, they are the opposite of white. Of course you have exceptions, not ALL are suffering from that syndrome. But a huge chunk is.