I don't think this is about making autistic people go away or find a "cure". Even if we eliminated all BPA magically, people are still going to be born with autism.
As the study explains, its probably only one element of how autism develops, but understanding how environmental toxins effect human development is important.
Marine mammals are stuck between a rock and a hard place currently. Theres highly pathenogenic avian influenza killing those that predate on seas birds and toxic algal blooms killing those that eat fish or bivalves.