When I first became a Christian the Mormons came to my door and I thought the Lord has sent them. I was very sincere when I became a mormon and I saw that they did really nice things for people and they encouraged people to be the best they can be and to put family first etc etc.
After leaving the mormons, bc I realized it was a false religion. Their founder was a con man and their doctrine is skewed (to say the least). Most mormons have no idea about the origins of the LDS, they are sincere in their beliefs. Sincerely wrong.
When I left I after some time I had a frightening encounter with something demonic and I went to a couple for deliverance. It was then they explained that I needed to repent of mormonism, a false religion. No matter how sincere, I had been involved in committing sin with a different god then Christ.
It doesn't matter that people are sincere or even ignorant of a group they pledge their allegiance to, if that group is not Christian, then they have pledged themselves to a non-christian alliance. It needs to be repented of, just as unbelief needs repentance and sins of commission and omission.
The root of Free Masonry is uncertain, there is a link to other gods but certainly a pledge to a god that can be accepted by unbelievers and all people of all religions... here is what I think is a fair article about Masonry. It explains why it has been known as a Christian org. and why it became more pagan, till today when it is quite secular.
You will have to decide for yourself if you need to repent ... I don't know your heart, your pledge or your intent. But it is not I that would be offended.
God bless, andrea
Freemasonry and the Christian Church - Are Masons Christian? - Probe Ministries
Looking at Freemasonry through Christian Glasses
(this site very accurately explains why Masons today are pagan, whether Hindu, moslem, christian or other, you all pledge allegiance to one God. How can that be? If your god is the same as the moslem, mormon, hindu or other... it is not the Christian God.)