The results of this Swedish study are not surprising to me. A lot of social workers won't like those results. A lot of conservatives will see their believes confirmed.
I think one needs to further analyse the initial correlations that came out of this research. In any case, it is worth keeping an open mind.
I wouldn't be surprised if a similar study would bring similar results for Venezuela, in spite of Venezuela having such a different environment as Sweden. The crucial thing would be: what can we do about it?