But you're talking about government spending (public money) that is a financial disaster. That can't be denied. But that 1100 million Euros in arms sales did not go to the government, it went to the defence industry. Don't you see what's happening? The defence industry is reaping the benefits of the wars while the people suffer (both in Germany because they have to pay for the refugees and wherever the weapons have been used).
Germany will spend at least 8000 million euros for refugees this year (2014 it were about 2400 million euros).
If there is any relation between exporting arms and the number of refugees, this is not only a humanitarian, but clearly a financial disaster.