It doesn't matter who was here 200 years ago, the borders as they exist now are what matter.

And even many hispanics who live here in the U.S agree that illegal immigration is bad.

It has nothing to do with race but the negative effects from illegal immigrants in the form of decreased wages, job opportunities, unpaid taxes, decrease of social services, etc... The United States and its tax paying citizens can't and shouldn't have to be responsible for everyone.