First import uneducated Turkish workers for unskilled jobs so they will work for cheap, and then discriminate against educated workers because you think it's being Turkish (rather than education) that makes the previously-arrived workers have trouble integrating. So Germany and Europe in general keeps getting more Erdogan voters while others just don't want to deal with racism and immigrate to other places like US or Canada.

If you really want to fix this, you have change the main demographic of Turkish immigrants, probably by offering a clear immigration path to students who come to Europe for graduate programs or such.