Just to say it, but Raiffeisen was a German founder of cooperatives for farmers. Part of that was banking. That concept moved to Austria as well. The local Raiffeisen cooperatives ended up coming together to form a larger bank to serve large corporate Austrian clients with international banking services. Part of that was sold on the Austrian stock exchange to raise more capital. After the Iron Curtain fell, they moved strongly into the former Communist countries and also offered retail banking services.
In other words German Raiffeisen banks have nothing to do with this at all and are perfectly decent places to do business. In Austria itself you will deal mainly with the cooperatives, which only own part of the Raiffeisen Bank International. If you are in eastern Europe then this is the bank you are dealing with.
TL;DR: There are more then one bank called Raiffeisen and most of them are perfectly fine places to do business.