i really doubt whether this guy ever had a look at BX's prospectus and know what he is tallking about.
1. The real cloud on BX is the taxation. It has nothing to do with China. the us politicans think that these PE guys earned too much. Yeah, subprime can be blamed more or less since the cost of capital is much higher.
2. Renaissance Technologies is a quant hedge fund, entirely different from a PE group.