yeah flanders has turned into a very racist place, both youth & old people have become quite racist ever since we had terrorist attacks in 2016 & like I said the 3rd generation of mostly moroccan immigrants love intimidating "real belgians". I say 3rd gen "immigrant" with it between the " " because obviously theyre not immigrant. But their grandparents or parents are; you can still see the difference and they usually have a very nationalist love towards their "mother" country and a distaste towards Belgium since the hate comes from both sides, its a very toxic cycle.
And no Wallonia isnt that dangerous I guess, depends on which people you 'hang' with. It's just impossible to get around wallonia by yourself if you dont speak that much french, like grocery stores etc, even in Brussels its quite hard to walk into a "french dominated" area and find people who speak english/flemish. Which is why I said survive :P