I certainly don't believe these close calls have any relation to angry reaction on the part of FAA controllers. At least not in any intentional or purposeful way. However, it is difficult to deny that job stress may negatively affect an individual's job performance.
Besides the silly disciplinary games FAA ATC management have been directed to subject the ATC workforce to, the matter of the mandatory overtime imposed on that workforce due to short staffing is doubtless a factor likely to increase the likelihood of operational errors. Increasing traffic counts coupled with decreased staffing and a contentious management/labor work environment don't seem like an ideal recipe for safety IMHO...
Still, in the afore mentioned occurrences, there is not yet any reliable information to indicate whether or not any ATC operational error or pilot deviation was responsible for the near mishaps. It's also possible that the procedures in use do not account for every possible contingency, and that the actions taken by the individuals concerned are the only things that prevented a couple of catastrophes.
I trust everyone is planning on exercising just a little extra vigilance while operating within the increasingly challenging US airspace and major airport environments.
Stay safe,
Westhawk