Sadly no one is 100% safe anywhere, but obviously minorities in the UK are especially unsafe. Higher risk of Black and brown people being shot by the police (and if you are visibly Muslim this is five fold), Travellers largely don't have adequate access to running water/sewage etcetera etcetera.
If my relative was killed in Glastonbury I'd expect the government to find and punish the perpetrator/s, not kill 25,000, many of whom are children in a bid to "eliminate" the killers.