He's not doing anything wrong with his release notes, but it is worse: it is a mistake.
The notepad++ guy comes across as a dingbat who cares about certain political things more than the software he's producing. This is a risk indicator. It doesn't matter if you agree with his current views or not. What happens when he takes the next step in using the software he's created to further his political ends?
The author is right to prepare for this possibility.