I don't have a problem with anyone disagreeing with the statement you're disagreeing with.  But I find it really troubling that the first response to it is to flag it.  I have seen people on hacker news regularly discuss whether or not there is global warming, whether or not HIV causes AIDS, and whether or not men are genetically more likely to be geniuses than women, each subject which has the potential to offend any number of people.  Given what hacker news is, I don't see why Israel should be such a taboo subject.  I don't see why it is better to flag than to refute.