Well then your cousin is part of Germany’s problems!
What crap timing for this sudden concern both by the DM and you OP.
Immigration brings so much to a country. With the exception of maybe the Andaman Islands virtually all countries have ALWAYS had people moving to them. Immigration is part of all countries. Immigration is part of life. Countries don’t fail because of immigration, they fail because of poor decision makers in power.
Stop blaming people who aren’t white. Stop blaming muslims. Instead of just reading the DM read more widely, educate yourself (not EDL daily snippets) but actual books. Raise yourself.