For anyone missing the required context here:
The “Renaissance institute” that sponsored this “research” is a far-right think tank associated with the FvD, which can be charitably described as far right nationalists, or less charitably as a bunch of actual racists and fascists.
Ah yes, before you know it we're off slinging Hitler accusations left and right. If you've got counter arguments related to the paper, you're more than welcome to share them. But discarding the entire thing because it comes from a political direction which isn't your own is hardly a productive attitude.
There’s political directions and there’s literal fascism. My grandparents gave their lives in the fight against this rotten ideology, and anyone who supports it and gives it credibility can go right to hell in my book.
Of course take things with a grain of salt, as always, but it's quite a hefty and well documented piece of research.