Western countries hold Israel to a different standard than they do Congo because they see in Israel a rich, Western-like, European-descended country. We in Europe and America judge Israel harshly not because Israelis are the Other, but because they're unusually like us. Does Israel really want to be judged by the same standard we use to judge Omar al-Bashir? Now that would be anti-Semitism.Take aside the most obvious difference between Israel and the rest of Western civilization - the Jewish State is surrounded by state and non-state actors which seek its destruction, in the way that Luxembourg or the great State of Illinois aren't.
Two thoughts come to mind. First, the notion that non-"European-descended" nations should be held to a lower standard than Western nations, simply because they haven't mastered indoor plumbing, is blatantly racist. Such double-standards enable and legitimize true atrocities and genocides.
Second, the issue is not so much that Israel is held to a different standard as Sudan and China, but that it is held to a higher standard than France, Germany, Britain and the United States! Quiet assassinations of Israel's terrorist enemies, with no civilian casualties, draw immediate international condemnations and front page headlines, while American and European aircraft and drone strikes against suspected Islamist extremists rack up innocent dead by the hundreds, with mere hand wringing. The Americans responded to the gruesome murder of two private military contractors in Iraq by reducing the city of Fallujah to rubble, causing thousands of casualties among the enemy and civilian population, not once, but twice. Meanwhile, Israel is expected to absorb thousands of cross border rocket attacks on its civilian communities or risk being dragged to the Hague for war crimes.
We finally agree that there is a double standard - just not on the one that matters.