Apparently, yes. The gist of it, if anyone is interested, is this:
Kojima was very condescending to the guys working @ Konami's mobile gaming division. But Konami's Dragon Collection, a gatcha mobile game, made them buckets and buckets of money. It was around this time the bad blood Kojima developed with the mobile division started to come back to bite him.
Konami management saw the money a simple game like Dragon Collection was bringing in and then compared that to the money Kojima was burning through to make MGSV happen. They didn't like that, so they started making changes to the company's structure. In the end, the guy responsible for Dragon Collection got Kojima's job and Kojima was given 2 years to wrap up MGSV in whatever way he could.
To spite them, Kojima scrapped PT's original design and instead built PT as jab at Konami, going so far as to release PT, and secretly announce Silent Hills, without Konami's full approval, using his connections @ Sony. This is the version of PT we got in the end and that story also tells you the probable reason why Konami pulled the demo: it was an attack on Konami itself.
After PT happened, Konami got furious @ Kojima and started isolating him to ensure he wouldn't try to sabotage anything else, maybe even MGSV itself. That's when news started breaking of the alleged split in early 2015. In the end, Kojima finished MGSV and was fired.