To obey the Pope's call to free the Holy city from the infidels and ensure access for pilgrims. To be forgiven for past sins. The Pope offered forgiveness for anyone who took part. This was important for knights who had killed many people in battle. To see the world, have an adventure and prove their bravery.
The British were taxing the tea and being violent towards the colonists so the colonist got mad and dressed as Indians and threw all the tea in the harbor
African Americans women because even in today's society, white people are "better than" different races. And woman don't get payed as much as men do in many jobs. When a white person is "above" an African American, this is considered white privilege. It makes me mad to think about it...