Response to an Ilegal, next time they bring up the "Your white ancestors..."

First, I am not white, so whenever an illegal immigrant writes or says this nonsense, it is silly to me. Part of my ethnic heritage is Native American, so these people who have no claim to this land, justifying it by using "white ancestors were illegal" blah blah blah. There is a good portion of American Citizens that are NOT white, did not come here illegally and helped build this great country for what it is today. I could go on, but I just came across a nice response about the whole "your white ancestors illegally came here":

Congratulations for working hard and putting some emphasis on the importance of education. However, you might want to study your history better. Your ancestors, the Spanish, murdered or enslaved the indigenous peoples of what is now called Mexico. When the Spanish headed north, they did the same thing to the indigenous people living in California. The Mission system was built on the backs of the Spanish's slave labor, the indigenous people. You must remember that you are a descendant of the Spanish conquistadors. So, if you want to hold me accountable for what happened to the indigenous peoples of the USA, then you must also hold yourself accountable for what happened to indigenous peoples of Mexico and the southwest United States. Where does it all end?