Have you ever seen this tv show called 'the news'? If you deny that Israel is commiting crimes against humanity, you either have never watched or read the news, or you are ignorant or stupid.
If commonly accepted notions of civility are insufficient cause to refrain from ad hominem
attacks, perhaps you should consider their implication that the maker has nothing of substance to say.
It is precisely because I read newspapers and watch broadcast news that my skepticism is aroused by statements that Israel is killing hundreds of Palestinians "for no other reason than that they are not Jewish which should be called race murder," the implication being that it is the policy of Israel to engage in the sort of ethnic cleansing that took place not that long ago in the Balkans, and is occurring today in North Africa. To be sure, Israel has used violence against Palestinians, sometimes with justification and sometimes without. I have yet to see any evidence that its purpose has ever been to exterminate Palestinians "because they are not Jewish." About 20% of the population of Israel is Arab, most of whom identify themselves as Palestinian, and nearly all of whom are either Israeli citizens or legal residents of Israel. More than 10% of the members of the Knesset are Arab citizens of Israel, as is one of Israel's Supreme Court justices. However heavy handed or oppressive you may think Israel's policies are with respect to the occupied territories, the suggestion that the nation is engaged in genocidal murder is far-fetched, to put the matter most kindly.
Similarly, because I follow the news, I am very curious about the source, if any, for the statement, "it's beyond reasonable doubt that Israel did it [i.e., murdered Arafat]." Though there is plenty of innuendo from those who see advantage in smearing Israel with the crime, I have yet to see any reported evidence to suggest involvement by Israel in the apparent poisoning. Nor does it make sense that Israel would have killed him. At the time of his death, Arafat, isolated in Ramalah, was little more than the titular head of an organization which had become moribund with factionalism and in-fighting. Israel did not assassinate Arafat when he had real influence. Why would it turn him into a martyr after he had devolved into impotence?
Then there was the comment about Israel "pull[ing] the 'we were almost killed off by the Germans' card." I am not one to assume anti-Semitism lies behind dispassionate criticisms of Israeli policy, many of which I share. However, reference to the holocaust as a "card," coupled with entirely unsubstantiated charges of genocidal animus and responsibility for Arafat's death, forces me to wonder just what really motivated these statements.
And, while I am on the subject of motive, there is also your suggestion that only someone who does not watch or read or understand the news could differ with your perception that "Israel is committing crimes against humanity." This is of a piece with the reflexive appeals of bigots to what "everyone knows," as in "everyone knows that gays are pedophiles," or "everyone knows that blacks are lazy and shiftless," or "everyone knows that Jewish bankers are conspiring to take over the world." Such incantations seek only to avoid thought and to shield prejudice from the sort of scrutiny which would show its factual vacuity.