I can speak for the SPD and the right-ish oriented ones in the Seeheimer Kreis because of my personal relationship with some people. I know that they value Turkey as a country and partner. One thing people dont understand is and this will be my first and only post on this topic is that:
a) Israel can do whatever the fuck they want, it doesnt matter. Germany will support it.
b) Saudi is seen as a country that can be exploited and milked, not a threat so deliveries, support, updates can be stopped whenever
c) Turkey is held to a higher standard than both countries, not because they want to see a weaker Turkey but because they want a strong Turkey that is democratic and a real partner to Germany and the EU.
Now feel free to speculate all you want, but I know for a fact that many from the Seeheimer Kreis wanted this deal to happen but there was no way to approve it after Imamoglu was arrested and the last bit of hope for a better future for the time being killed.
Maybe the CDU led government will try again, but its no longer in the hands of the SPD and the current coalition.
Here's Imamoglu tweeting out of prison, that the jets should be delivered regardless of his faith: