Original sentence: What probably emerged as the prime distinction between the NACCC and UCC is the former body's refusal to engage in political activity on behalf of itself or its constituent churches, something that has become controversial in the UCC; the NACCC does not take such positions, while the UCC biannual General Synod and Justice and Witness Ministries often make politically liberal (according to the Biblical Witness Fellowship, "leftist" ) statements that are contrary to the beliefs of some of of its more conservative congregations
Edited sentence: What probably emerged as the prime distinction between the NACCC and UCC is the former body's refusal to engage in political activity on behalf of itself or its constituent churches, something that has become controversial in the UCC; the NACCC does not take such positions, while the UCC biannual General Synod and Justice and Witness Ministries often make politically liberal (according to the Biblical Witness Fellowship, "leftist" ) statements that are contrary to the values some of of its more conservative congregations