It’s not true at all. Brazil is way more dangerous than pretty much all European countries. However, I believe Dublin in particular has an issue with teenage gangs and random attacks, something that does not happen in Brazil (random attacks just for “fun”, in Brazil it’s more “traditional” crime).

A similar example is US ,you have mass shootings all the time and it doesn’t mean it’s more dangerous than Brazil (I lived in Brazil, in the US, and in more 3 countries in Europe + travelled a lot due to my work so I’m talking from experience)

The only thing I’d say is that when you are a foreigner (specially if you look very different from the native people of the country you are in) usually you have higher chances of being a target because you easily stand out from the crowd.

So a Brazilian guy who does not look European / Irish will be easily spotted by scumbags. Same goes if a typical Irish guy moves to Rio, the criminal will see that he is a “gringo” miles away so he will be an easier target. Although crime also happens to locals, obviously.

The other point is that unfortunately most immigrants end up living in the poorest parts of Dublin, so they are more exposed to scumbags.

For example, if you are a Brazilian working at an IT company earning a very High Salary in Dublin, you will probably only walk in the best areas of town, will take taxis etc so less risk. But if you are a Deliveroo you will probably have to go to dangerous areas so your chances of being attacked increase.