You personally showed up in Frankfurt so we decided to chase you as you fled. Yes, we were chasing you because the Black Sails have been causing the RM a lot of harm in-role play so it was obvious that we won't let our hold of you once we have it and pursue you as far as our ZoI allows.
We also regularly patrol Sigma-13 for months now, the Rheinland Military has an influence until Helgoland station and the debris field around it, the GMG gave us permission to have such. I can dig up the thread if you really insist, but anyone who has been frequently accessing the Sigmas can note that we indeed did patrol it regularly.
We also know of Yanagi, it is not an unlawful base. Yet, none of us did the "oh look, they are obviously using Yanagi as their base!" practice, which is something that could have sparked negative feedback.
All the Rheinwehr did was to catch a lone fighter, pursue it, then it clumsily took its pursuers to the hornet's nest, which just so happened to be within the ZoI of the military force. We don't chase criminals back to their bases because that's not in our ZoI. The Helgoland debris field is very will within our ZoI.
Our conduct was entirely fitting in role play. Of course, we couldn't have been aware of you not willing to fight, training recruits, or wanting to "shake us off". It has been the practice of the Black Sails which I witnessed quite commonly (in character and out of it) to leave before being engaged, then return with a greater force. Happened quite often, which I both in-character and out of it, thought would be the case.
But of course, I can authorize my men to send battleships on you when we don't approve of your presence in Hamburg. It would be very much justified both in role play, and seeing today's conduct, out of it as well. Let's hope we won't have to resort to our relations derailing like that.