According to you.
I prefer to judge people by their loyalty to their nation. Mine is America, and I am loyal to it. I don't care if someone who came here legally is from Viet Nam or Russia or Mexico, as long as they are loyal to America now. And if someone's family has been in this nation for 25 or 250 or 25,000 years, as long as they are loyal to America they are my brother or sister.
OTOH, if someone is covertly dedicated to erasing our borders, and melding America into a world government, or retaking the Southwest to create "Aztlan," they are my enemy. And in that case, I don't care how long they have been in this great nation.