Crime statistics split by demographic are commonly used as a dog whistle by racists. The people posting them typically aren't interested in discussing the reasons behind a particular demographic committing more crime beyond asserting that it's due to inherent traits.
That those statistics were posted as a dog whistle is backed up by the user's other posts.
On Portugal's African colonies:
> The only thing to apologize is to ourselves. We should haver never went there and left you in the stone age.
> All the infrastructure we left you weren't able to maintain, as it happened with 99% of the African countries.
> Total mystery why.
Casual quotation marks around youngsters:
> And now robbing stores is becoming rampant as we can all testify by the loads of videos of "youngsters" entering stores and taking what they want without anyone doing anything.
That those statistics were posted as a dog whistle is backed up by the user's other posts.
On Portugal's African colonies:
> The only thing to apologize is to ourselves. We should haver never went there and left you in the stone age.
> All the infrastructure we left you weren't able to maintain, as it happened with 99% of the African countries.
> Total mystery why.
Casual quotation marks around youngsters:
> And now robbing stores is becoming rampant as we can all testify by the loads of videos of "youngsters" entering stores and taking what they want without anyone doing anything.