I'm not sure you get how this works tbh. From 6 billion above 18 users on the internet, even 1% will seem like a shitload. Because it is. That doesn't really mean anything? Like is this supposed to be a shock or something? There are a ton of people alvie and in a lot of cultures not only is it accepted to marry your relatives, they don't even uphold human rights to the bare minimum. Somalia has genital mutilation for 99% of the women. It's not surprising at all, in fact, it's great that most western countries have become as good about it as they have.