It is possible that an ancestor became Jewish in Germany, but it also well possible an ancestor became Jewish in Iberia.
The number of DF27 in Germany is fairly small, but the combination of a Jewish and a nearby (GD=4/67) non-Jewish person is also exceptional.
This branch is in the -group of Jewish Branches.
The following kitnr's are recognized in this group:
180392
Kits with nearby 67-markers are found in semargl.me
Check for yourself by inspecting the data that was used.