You want people with respect for basic united principles, such as a guarantee of basic rights, and a fair and just legal process. Whether people are the same race doesn't guarantee that, many revolutions and wars prove this. China is mostly Han, but that didn't stop Mao from killing millions of them.
When people don't have a basic respect for others or their property, aren't allowed to speak freely, and when justice is primarily political, and they don't feel represented, you have problems.
You want people with respect for basic united principles, such as a guarantee of basic rights, and a fair and just legal process. Whether people are the same race doesn't guarantee that, many revolutions and wars prove this.
When people don't have a basic respect for others or their property, aren't allowed to speak freely, and when justice is primarily political, and they don't feel represented, you have problems.