I am speaking as the citizen of a country that is the source of immigrants for western Europe, Romania. According to Wikipedia we have the fifth-highest emigran

I am speaking as the citizen of a country that is the source of immigrants for western Europe, Romania. According to Wikipedia we have the fifth-highest emigrant population in the world, I would estimate a fifth to a quarter of the population. The criminals are extremely over represented in the emigrated population - mostly pimps, prostitutes, thieves, drug dealers. I will not make an estimation of percentage, but they are significant. Please do note the difference between "significant" and "majority". Now coming back to your comment. Firstly it is not about racism, we are Caucasian. Secondly we are discriminated abroad and while it is unfortunate for me whenever I travel or work I completely understand it. Our criminals did a lot of harm. That is why I said a filter would have been better for them and us also.