What's with your xenophobia/racism haunch? It is not unreasonable to discuss such effects due to relative open - e.g. compared to US - borders.
Last year in Germany I myself saw 'gangs of beggars'. While not a problem, it annoys me when on touristic places you'll get asked for money every two minutes from one of the (romanian) women with child. It feels like an industry.
It is an industry. Most of these gangs are exactly that: organised gangs. In a recent documentary in Ireland, they studied the problem and even followed them back to their own countries (where they lived in mansions). One of the women they followed carried a baby around for 14 hours while begging and it turned out it wasn't even hers - a number of the women shared this baby as a tool to gain more money while begging.
A friend of mine once overheard a beggar talking on the phone complaining that he only made €500 that day...
Not all beggars are like this, of course. Some genuinely fell on hard times. I have no problem buying someone food or paying their bus fare (if I have the money), or donating money to charities which help these people directly, but I refuse to ever give someone who is on the street begging for money anything.
If he hadn't said it, replies would have expressed surprise that the prosperous Swedes had resorted to aggressive organised criminal behaviour, and there would have been speculation on why that is.
There would also have been questions on why the government hasn't done anything about it yet, which he also addressed in his comment.
Stop telling us what we can and can't talk about.