The main ethnic groups in the USA when the Manifest Destiny took place were mainly Native Americans. I don’t know exactly what their tribal names were, but for sure native Americans were the main ethnic group.
The manifest destiny of 1845 impacted them in a bad way bc the settlers basically pushed them out of their homelands. The settlers made war against them and the native Americans with less weapons would lose the battle.
In essence, the Native Americans has their lands stolen from them and their people killed because the settlers believe that they had the God-given right to expand their territory, even if it meant killing off other people.
Explanation: The Shays insurgents claimed they were fighting for liberty as they did in the Revolution while the governor and other political leaders saw it as tyranny. The political leaders saw this as a threat to government and to the security of life and liberty. Additionally, there were former veterans fighting on both sides. Thomas Jefferson, while away in France, thought that "a little rebellion now and then is a good thing". He thought it was necessary for the health of the government. (Actual answer)