He was given a green card as a "prominent educator" despite not having a degree himself. Anyone who's been through the US immigration wringer knows the process is very strict, and prima facie Gülen was not eligible.

The only similar case that springs to mind is the maid of the former Indian vice-consul in NY's maid:

https://www.thehindu.com/news/international/world/maids-fami...

That also stinks to high heaven, and created a serious diplomatic incident with India.