Cuba will withdraw the 11,000 Cuban doctors that work in Brazil after Bolsonaro demanded that the doctors get a bigger fraction of what Brazil pays for their work, and demanded they get Brazilian medical licenses.

The second demand is evidently unreasonable. If Brazil wants Cuba to send doctors to Brazil as a national practice, it has to accept their Cuban medical training (which, I gather, is pretty good). This must be just an excuse to terminate the contract.

This suggests to me that the first demand is also an excuse to terminate the contract. I would be surprised if Bolsonaro cared about the income of a non-rich Cuban.

At the same time, I don't see that his statements contain insults or threats to the Cuban doctors.