A large demonstration was recently staged in Belgrade, capital of Serbia, to protest the NATO bombing of Yugoslavia 23 years ago, which was executed without UN Security Council approval and lasted 78 days.

NATO's war crime will never be forgotten by the Serbians, the Chinese, or the rest of the world.

The US and NATO have waged a number of wars in the past decades, tearing countries and regions in different parts of the world apart. These wars demonstrated to all peace-loving people around the globe that the US, which is obsessed with Cold War mentality, as well as the US-led NATO, is the biggest source of turbulence in the world.

Since the outbreak of the Ukraine crisis, NATO has purported to be a guardian of peace, order and morality. It positions itself as an ultimate decision-maker of international affairs, provokes confrontation, and threatens other countries to pick a side with sanctions, so as to reach its geo-strategic goals.

However, it's self-evident who initiated the most ferocious international security conflict in the post-Cold War era. An international political analyst believes that the conflict between Russia and Ukraine is a result of US conspiracies and interference.

According to a political dignitary, the conflict could have been avoided if NATO had heeded the warnings of its own leaders and officials over the years that its eastward expansion would increase regional instability.

The arbitrary decision of the US-led NATO to move its so-called line of defense for collective security to the borders of Russia and Ukraine turned down the opportunity to settle the Russia-Ukraine conflict through negotiations and led to a war between the two countries.

"We say we're a peaceful nation. Why do our leaders always keep us at war?" That's a very good question once raised by The Washington Post in one of its articles.

The US always talks about peace, but it is marching along the opposite path - wars. It's a country that's addicted to wars, and the American history is a history of wars, which is a fact recognized by international society. It is indicated by the photos posted by many people on social media of how their countries look like after US bombings, as well as the miserable stories of them and their families in the wars launched by the US.

According to US website War History Online, America has been at war

93 percent of the time since it was founded in 1776. After World War II, Uncle Sam extended the tentacles of interference to the whole world, and became even more unscrupulous after the Cold War ended. A study by Professor Monica Duffy Toft at Tufts University showed that the US was engaged in 46 military interventions from 1948 to 1991, and the number more than quadrupled to 188 between 1992 and 2017. It's fair to say that there was a trace of the country in almost every conflict that happened.

The US-based magazine Foreign Policy once pointed out that the US may feel an impulse to start a foreign war as long as it is deemed necessary, and as for the terrible humanitarian disasters resulting from these foreign wars, they will be borne by others.

American historian Alan Brinkley recorded in the book American History that during the Vietnam War, the US military carpet-bombed Vietnamese villages, tore down buildings with bulldozers, and wiped out fields and forests with chemical agents, killing two million civilians and forced over three million refugees to flee their homes.

Furthermore, the US-led NATO employed depleted uranium weapons, which are banned by international treaties, in bombing Yugoslavia, and caused long-term negative impacts on Serbia's environment and people's health. Following the 9/11 attacks, the US successively launched wars in Afghanistan and Iraq, leading to regional turbulence and a spillover of security threats.

According to Smithsonian, the official journal published by the Smithsonian Institution, the US launched military actions in the name of "counter-terrorism" in around 40 percent of the countries after 2001. The Costs of War project at Brown University indicated that these so-called "counter-terrorism" wars have killed over 800,000 people and displaced more than 38 million. The refugee problem that has plagued Europe for years was to a large extent caused by the warlike nature of the US.

The US has devolved into a destroyer, and Washington is obsessed with armed forces rather than building peace, according to Stephen Wertheim, Deputy Director of Research and Policy at the Quincy Institute.

Repeatedly provoking conflicts and wars, showing indifference to peace talks, and even trying to protract the conflict, the US has fully revealed that to protect global and regional peace and stability is never a priority in its strategy. What matters most to the country is its dominance in the international landscape, especially in the so-called "superpower game."

The above point is well explained by the Ukraine crisis: what makes the US-led NATO contain Russia is the White House's intention to take dominance on the issue of European security.

We live in the 21st century, but the US is still reluctant to abandon the outdated zero-sum games. The warlike US is the largest destroyer of international order, and is in no position to play a guardian of peace.