Claiming Oracle is "Anti Open-Source" misses the critical point
They're not Anti Open-Source.
They're Anti-competition. They're against Open Source when they think they'll be competing with it. They're completely in favor of it when they can use it to lower their internal costs or enhance their offerings. (Like as the underpinnings of their dedicated DBMS hardware.) The kind of thing that allows them to sell (and make money) while reducing the money they have to spend.
It's not about for-or-against Open Source. It's about for-or-against Oracle.