"Make Mine Freedom" looks like the sort of film that was made to show high school civics classes. While it is at times heavy-handed and a bit obvious, it does spell out why communism is a bad form of government due to the repression of personal freedoms. It makes its point very well. And, while it looks dated today, it was quite effective in 1948.
I noticed another review questioned if the Hanna-Barbera team actually was behind this production. Well, normally I'd think this isn't that important, but it IS true that this looks absolutely nothing like any of their other films. And, it does look more like a Walter Lantz or a bit like a Warner Brothers film in many ways. I am not sure why, but it looks nothing like an MGM cartoon of the era--especially because in the late 1940s, MGM had the most beautiful cartoons and had a very distinct style--both of which are lacking here.