@McGentrix,
There are two religious objections of.Quakers Jehovah's Witnesses and similar groups come from two places (a branch of my family is traditional Quaker and I have some experience with Jehovah's Witnesses)
1) Many people interpret the pledge as a contradiction of Jesus' prohibition of oaths in Matthew 5.
2) For some it is impossible to pledge alliegence to both the Kingdom of God and an earthly government. There are Bible passages to support this including in 1 Timothy.
Arguing about other people's religious beliefs is troublesome. But I do have some experience in this world. These arent social justice warriors ... in fact many churches that object to the pledge are also teaching that women should be submissive to their husbands. These are traditional religious views.