Politics is not limited to specific parties or governments. Politics is also concerned with the principles of an organization within their sphere, particularly if those principles are about who has access to power.

The FSF is very concerned with who has power within the relationship of software author and user -- namely that users should retain the power to redistribute and edit their software.

If someone is trying to ensure a community retains power or someone is trying to ensure a community loses access to power, that's politics too.