Not OP; but I would define it as a cluster of specific and strongly held opinions on several topics, such as race/ethnicity, sex, migration, climate change. These opinions cluster together, and produce certain recognizable behaviors including speech patterns, speech taboos, and aggressiveness towards people who do not share these opinions.
Could you not define MAGA in exactly the same way? The opinions are different, but since you haven't said what they are, the definition works for either.