What is considered a good analysis point?

A good analysis point would be something that is derived from your knowledge point and backs up your line of argumentFor example for the essay: How important was prejudice and racism as a reason for changing attitudes towards immigration in the 1920s? Your knowledge may be: The KKK had 5 million members in the mid 1920s.An analysis for this point must address how this is racism, and also why and how this changed attitudes towards immigration. So something along the lines of: this was a racist organisation that spread a lot of new attitudes towards immigration, and a way of viewing immigrants. The organisation aspect allowed them to put their numbers and high ranking members to good use, blocking bills and organising protests, leading to collective change in policies and attitudes towards immigration