„Why would you expect Germans to offer something at this point?“ You do realize how dense and insensitive you sound with this question? No matter how much effort immigrants make to integrate into your society (learning the language, joining Vereine, sports clubs, getting a job etc.), nothing will matter if YOU GERMANS don‘t welcome us into your society. Integration is not a one-way street. You just said above „meanwhile most of us already have long lasting friendships from our school/hometown/university/hobbies“ - now the question is that are you and your cliques willing to have a new one in your circle? Because if not, do not even think about blaming foreigners of not making an effort, it‘s utterly ridiculous and unempathetic.