Perhaps you should check for green cards and credentials.
You mean the staff and faculty? I doubt green cards are necessary for any of them. We are talking about Minnesota here. We have a large Asian and Pacific Islander population in St. Paul. We get new immigrants -legal immigrants all the time. I’m sure we have some illegals from South and Central America, but they are a small percentage here. Vento is a school where less than 5% of the students are white (and I bet some of them are immigrants).
They have decided to stop celebrating holidays that few of their students celebrate at home. Most Twin Cities suburban schools stopped celebrating them 25 years ago. I don’t think it is a big deal - in Minnesota. It might be elsewhere in the country. This is why I am for local control over schools. Minnesota schools have different issues than schools elsewhere and St. Paul has issues that are unique to St. Paul.