Complex sentence: A large proportion of The Frankfurt School were ethnically Jewish immigrants forced to flee Nazi Germany during Hitler's rise to power in the 1930s, this process greatly informed their Critical and Cultural Analysis, as well as their stance against fascism.
Split into simpler sentences: A large proportion of The Frankfurt School were ethnically Jewish immigrants forced to flee Nazi Germany during Hitler's rise to power in the 1930s. This process greatly informed their Critical and Cultural Analysis, as well as their stance against fascism.