If West Europe did not colonize Africa, Arab, and Asia, things would have been much more better. In fact, how many Western Europe Conoloialists killed the people under its power. Even worse, Europe still does not make any apologize for the countries that they have colonized. Western Europe has the sin for giving birth to Communism, resulting the death of 100 million people. They are responisible for many more deaths. In fact, Western Europe still had attempt to support dictators such as Iraq under Saddam Hussein, and attempting to make weapons sales to China, ignoring the human rights being violated.
Western Europe made many mistakes, HOWEVER had they not gone to Africa and India those places would be bigger hell holes than they are. As to the Arabs perhaps a History 101 course would help you to learn who attack where first.
"Western Europe has the sin for giving birth to Communism, resulting the death of 100 million people"
It also gave birth to capitalism. Take the rough with the smooth.