Strasserism is a political ideology that was named after two brothers named Gregor and Otto Strasser. They were part of the Nazi party back in the 1930s. Strassersim combines socialist ideas with those of extreme nationalism, which is a strong belief in putting your own country above all others.
So, imagine that you and your friends all have your own toys, but you really love your own toy the most. Strasserism says that your country is like your favorite toy, and it should come first above everything else.
The socialist part of Strasserism is about trying to make everyone equal and fair by sharing things like money and resources. This is kind of like when you and your friends share your toys so everyone can play with something new.
But, Strasserism also says that other groups like people from different countries or religions are not as important as your own. This can be a problem because it can lead to people hating others just because they are different.
So, to sum it up, Strasserism is an idea that wants to put your own country first above everything else, while also trying to share things fairly between everyone, but only for people within that country.