i was reading the news coverage about this petition and fond an article in The Peninsula, a Qatar's Daily English daily.
it was mention there that 10000 signatures are enough to force Wikipedia to remove there images. but i like to clear the world that was my personal estimate, not a Wikipedia policy. so i encourage more and more brothers and sisters to sign this petition so we can put strong and constant pressure on Wikipedia. As Wikipedia is hosted in California only public pressure or California state can force Wikipedia to remove such hate material. hope somebody from California will help us to take this petition to concern authorities.
here is another good story related to my petition.
Wikipedia accused of 'US-centric bias'