The original email appears to indicate they intended to contact CCP authorities. The inference I took is that they believed the developer was in China.
Later they stated that violation of law in Canada could result in revocation of visa.
So "threated to have someone deported" is maybe a stretch, "tortuted" is pretty untrue.
The github issue appears to show a pretty reasonable attempt by both parties to move forward.
1. https://github.com/Xmader/musescore-downloader/issues/5#issu...