Complex sentence: At the time, the Klan was growing in influence and power across the state, and had drafted an overtly anti-Catholic and anti-semitic compulsory school bill, which addressed the issue of public tax support for private schools such as Catholic schools.
Split into simpler sentences: At the time, the Klan was growing in influence and power across the state, and had crafted an overtly anti-Catholic and anti-semitic compulsory school bill. The bill incorporated the issue of public tax support for private schools, i.e. Catholic schools.