First of all, 10% less is 90%, not 99.99999%.
Second of all, no it didn't. You're cribbing the term "enemies of Hitler" from the National Review's non-footnoted term "enemies of the state," which the 1938 law didn't curtail from gun ownership, not a bit. It doesn't even mention them, and it doesn't even limit the ability for Jews to own weapons, not a bit. That wouldn't come until the order Hitler gave eight months later.
Also, remember this: None of these were actually legislature-passed laws. Every "law" that Nazi Germany passed after 1933 was a decree from Hitler, using the powers given to him when he strong-armed Hindenburg into giving him "emergency" dictatorial powers. If he had wanted to "pass" laws making every gun in the country illegal, he could have, but he didn't, because he had already done what your argument says he was trying to do: he had already taken over, without needing to take everyone's guns.
And it wasn't until just now that I noticed that the National Review article was written by Stephen Halbrook, who is an anti-gun-control lawyer with a well-broadcasted agenda, and his education is in psychology, not history or political science. Here, I found this paper written by Bernard Harcourt, a Columbia Professor with a background in political science, writing for the Fordham Law Review with the kind of extensive notes and detail that Halbrook lacks. It addresses the Nazi gun laws and Halbrook's position specifically, starting on page 669. (Don't be put off by the page number; the numbering starts in the 650s.)
If you read far enough, you may notice use of the term "enemies of the state" by one of Hitler's lead goons, which is likely where Halbrook picked up on the term.
Enjoy.