Just weighing in...
I think the answer to your question is as follows:
When you say " opinion of World Leaders", you are assuming that these are objective opinions. As you can see from the "greatest" democracy in the world, a world leader does not necessarily carry the opinion of what congress (in our case), which gives a broader representation of our country feels. If our democratic leader is skewed by his own personal agendas, what does that say for the rest of the world??? The bottom line is that the Moslem population worldwide outnumbers the Jewish population by many multiples. World leaders have their own agenda, wither it is to make their constituents happy, keep their power, financial considerations of their country and own wallets, etc...
Look at Egypt and Saudi Arabia... They have to put on a front of we hate Israel, but reports show that they are absolutely scared of what would happen if Israel would be Palestine. You think the Chinese don't benefit and appreciate Israel's contribution to their economies? But the Arab world is so much bigger... Same with Russia. So, how are we to weigh public opinion? How many Arab Israelis are afraid of living in "Palestine"? They would lose their democratic rights... Israel allows Arabs to live in their country. Palestinians have said they would never allow Jews in their country.
We as jews, may be biased to Israel. But we all are biased one way or another.
However, the United States and Israel, 2 democracies that are both sworn enemies of "Radical Islam" ( don't tell BO we used those words), have a common fight. We gave land to the terrorists in the name of peace before. What did they do with it? Appeasement with land does not work with these people.
BO has taken the position, wither it was Iran, Egypt, Syria, etc... that instead of standing for what American Values are, we will try to appease them and they will like us more. What do you think the world opinion is with regard to a Nuclear Iran? It is a good idea??? But the world leaders would rather stick their heads in the sand and worry about their own countries.
American values have always been pro-democracy. Israel is a democratic country. Would Palestine be democratic??? The stance he took was against the wishes of his constituents ( congress) and against the only other democracy in the region. How can the United States turn blindly to the Terrorism that is sponsored by Palestinians? Only BO, who believes that you appease the wolf first would think that this is the best form of peace.
At best he is misguided in thinking that the only way to peace is to first give the terrorists what they want and that will stop them from their terrorist ambitions. More likely, he is just anti-american and anti-Israel. It is all about his liberal agenda.
Why no intervention in Syria? That could've been his legacy? This was just much easier for him. And if this was his policy all along, why wait until after the election, in the 11th hour to do it? Obviously he knew that the "popular opinion" is not with him...
So if the leader of the most "democratic" country does not follow the popular or sensical opinion of his country and pushes his personal Liberal agenda, what does that say for every other country? Everyone has an agenda ( as do we...).
The bottom line is we are too small of a factor of the world for the "world leader opinion" to be objective.