I guess some people living in countries with high crime rates are just tired of it, therefore they are just looking for any solution. In safer countries where you don't have potential criminals on every corner the perspective is different. I wouldn't want 24/7 surveillance in Poland or Czechia but I would consider them being lesser evil in big US or UK cities.
Which UK cities have high crime rates? The murder rate in the UK is much lower than in the US and slightly higher than in Poland, been trending down for a long time and pretty typical for a developed country.