The "External links" refer to third-party websites. For those websites the original provider/author is responsible. We checked those website for legally prohibited content at the time of linking. At that time no legally prohibited content was found. We have no influence on the current and future design and the content of the linked websites.
The deployment of external links does not mean, that we adopt the content behind those links.
A perpetually checkup of those external links without concrete hint on legal violations is not reasonable for us. At knowledge of a legal violation the respective link will immediatly be deleted.