Invasion of Tibet - Tibet was already part of Qing Dynasty and considered part of China for more than 400+ years. Mao invaded Tibet to take back China's traditional borders and if anyone look at the official maps of China in early 20th century before WW2, it has always included Tibet as part of China

Russia Ukraine is not totally unjustified especially the area where it has huge population of Russians

As for Israel Palestine, Israel actually won the war fair and square against the Arabs. So, can you really say they don't have any rights over the lands at all?

As for Tibet, it was part of China for more than 400 years before the 20th century. All the maps of the world in early 20th century also show Tibet as part of China. Even KMT also consider Tibet as part of China when they were ruling China. So, who are you to say Tibet is not a part of China.

If that is the case, India was never a unified country and consists of small kingdoms. It was the Brits who created the borders of modern India, So, India is not justified too?

Does every country in the world today are formed with self-determination?

If you want to question this, then most countries in the world today won't have the same borders as today

Fact is no matter how people like you want to deny, Tibet today is undeniably a part of China. Similarly, Israel as a country is also an undeniable fact too