" I'm thinking that the sentiment is in regards to the liberal foundations started by these men."
No, he actually hates their business practices.
I, too, hate any business practice that distorts a free market.
Rockefeller, certainly, was no free market capitalist. The last thing in the world that he was looking for was a free market.
All by himself, he was his era's OPEC cartel.
"No, he actually hates their business practices"
No, I dislike some of their business practices, but dislike intensly, their lust for power over politics, the markets and people.