The situation of migrants in Europe in General is very strange. It seems that with their help, someone wants to destroy Europe. There are countries of Asia, poor European countries and their inhabitants are not allowed in Europe, and Muslims go there in the millions. What is it?
Because the politicians want the Muslim immigrants to migrate to Europe. For example, Angela Merkel of Germany views them as a loyal voting bloc for her party. I don't think that she can expect the same kind of loyalty, if she permits the immigration of Ukrainians or Moldovans.
And as the migrants will vote for her? They don't get citizenship and are not entitled to vote. Moreover, they significantly reduced its rating. So it seems to me that she has other goals. As for the Ukrainians and Moldovans as cheap labor, they are much more acceptable than Muslims.