Part of every child's upbringing needs to be about teaching the child to treat everyone, everywhere, whomever, no matter what, with kindness and Christian charity. I only say this because, in many societies, bullying tends to be tolerated as "just the way things are" --- British schools come immediately to mind. (Note: I was born and raised in the US, and live here now, my only knowledge of the UK is anecdotal, spent all of three days in London 30 years ago and that's it.) There has been an undercurrent, an expectation, that some children (and it is usually boys) will bully other children (usually boys as well), and that is just the natural order of things, the bullied are supposed to learn to live with it, and the bullies grow up into God-knows-what, possibly successful "alpha males" who take this attitude into adult life, at least some of them.
I don't carry much water for modern, "touchy-feely", "sensitive", can't-say-boo-to-anyone therapeutic social movements, but in this case, the "snowflakes" may be right. Even a broken clock is right twice a day.