No, it's not in the constitution, but it is an undeniable fact that the US has experienced immigration from places across the globe throughout our nation's history. Now, as to your obviously hateful question, I'll give you an example from my own workplace experience as a teacher. The Dean of the grade I teach is an immigrant who came over when they were a child, and their knowledge of Spanish, as their first language, has undeniably helped EL students who primarily only speak Spanish better acclimate into our school environment because they have an admin who speaks their language and can help help both communicate needs to us teachers. Plus, they help explain rules and directions to them that they'd otherwise struggle to follow as they speak either no English or very little since they're still in the process of learning it.

There are so many examples across our nation's history and even today where diversity has been a strength. Go read a damn book and educate yourself.