He didn't threaten anything. People need to watch his PC instead of just reading the articles.
Gase was disappointed, upset, angry, you name it. But his tone wasn't threatening towards the players. He mentioned looking at every possible angle to correct this, and that includes lineup changes.
Also, it's obvious some guys are not showing the professionalism he expects, he did allude to that a couple of times. But if that's the case, then I'm all for those guys being held accountable for their lack of preparation or whatever else is happening.
Now, he definitely needs to improve his pre-game planning and gameday play-calling, and I'm sure he knows that. But some of these articles are making it sound like he's only pointing fingers at the players instead of taking himself the blame. Watching his PC I didn't get that impression at all.