and just tell me why knight capital is always around shorting American companies to the ground instead of supprting growth.
Although you asked me not to say this, they're just doing what they're supposed to do. MMs ALWAYS have to work against market sentiment. If most people want to buy, they have to sell. If most people want to sell, they have to buy. That is their job.
Their job is NOT to "support growth", by which I take it you mean drive stock price up.
do u have any links to prove that knight has not shorted illegally costing hard working innocent people money.
It is impossible to prove a negative.
Market Data 
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