Ought, and are, are two different things. My family felt threatened, and concerned for their children. My 9 year old DGD repeated in front of me what she had heard from an influential local school mate. We were at mine, in a local park with a boating lake.
Many muslim families were there enjoying the day, and many boats just full of women, some with headscarves, some not. its along established community, 3rd or 4th generation - families producing doctors or teachers, etc etc.
Looking at the boats, she came out with, "why cant "they" learn English and wear "our " clothes"
Obviously there has been much putting right since, quiet chats, and including her grandad my Ex having her for a weekend in Manchester, and his neighbourhood is mixed race, including lovely friendly caring neighbours. Just going for a walk was enough, normal life.
People talk about "ghettos" culturally, but where they live sadly has also now got elements of that, fired up by those living in an all white area who don't actually mix with anything but white people plus take outs.
I don't think they are evil or anything like that, but I do sadly reflect on the effect far right propaganda has had so's it could happen in a primary school.