I wonder what the rate of mass suicide is in general for "all 50 states of the United States" vs Chinese companies like Foxconn.
Didn't happen at Foxconn. They were all on separate days over a few years. Not sure where you got "mass suicide" from. It's not mentioned in the comment you refer to.
So, yes, that's unusually bad with not many in the U.S. that can compare. I'll be interested if you know any companies in the U.S. where over ten people have jumped off one roof with company installing safety nets.
source: http://lostallhope.com/suicide-statistics/us-methods-suicide
This actually has more odds of happening.
I've been inside Chinese factories and they seem just like factories anywhere else. Americans need to stop imagining China as some giant North Korean slave camp. It's got very low unemployment, a huge middle class and quite reasonable working hours, pay and job mobility, especially for young people like those Foxconn workers. Health and safety is a wash though but that's another matter.
Of course, China could always reduce their media censorship so we can get honest coverage of everything. Then, we might know more. :)