There are enough devout Orthodox Jews in the Israeli Army - even in the squads and regiments commanded by Sharon in his military career - that a crime such as what is described could possibly have remained concealed or that some of his troops wouldn't have mutinied or the like.
The article, by Tariq Al-Maeena, attributes this quotation to some guy, identified only as Omar, on a fishing trip.
Thereafter the quotation is picked up and ruthlessly reprinted - without any mention of Omar or the fishing trip - by numerous pro-Arab or anti-Jewish media; always in exactly the same words - not even showing whatever flexibility there might be if they had found the quote in its original language and translated it themselves. The Palestine Chronicle's search engine, nor any other reference tool, mentions a General Ouze Merham except in connection with this phony quote.
If there were any truth to this quote it would have shown up in some of the biographies of Sharon, especially those by his (numerous) political rivals and enemies in Israel, but even those people didn't use it which means it must have been very obviously fake.