Many of the wars ongoing throughout the world are raging between peoples in poor, developing countries with non-democratic values who, to be blunt, many (usually xenophobic) people in developed democracies would write off as "they don't know any better; that's just their primitive culture".
Israel is a highly-developed, wealthy, modern, democratic western (politically and culturally, if not geographically) nation - and also a nuclear state. Basically, they are held to a much higher standard because of that.
Just like the outcry of disgust when the UK and USA (and others) start or react grossly disproportionately - such as the wars in Syria and Afghanistan. Many of us despise Blair, Bush and their ilk to this day because of it.
Also, I think it's very important to point out the difference between governments and leaders and the ordinary populations. Just like, in Russia, the thinking people blame and hate Putin and his henchmen, but don't apportion any kind of blame to Anna and Dmitri who are hard-working farmers making a living in their community in Rostov-on-Don.
If some people do start to conflate the governments making highly controversial choices with all of the everyday citizens, that may well indicate a racist and prejudiced mindset.