For an explanation of this series, see Brandon E’s Objections: #1.
Brandon wrote the following (you can find it in context here):
I would suggest that you continually placing yourself on the side of God, the apostles, and the believers, and placing the believers whose views you contradict and antagonize on the side of the Sanhedrin who opposed the very name of Jesus, indicates an exceedingly sectarian spirit.
To be sectarian is to promote a sect. A sect is a group. I am one person who follows the Lord. I want no one to follow me. I only want to see people follow the Lord. You are the sectarian because you want me to join a sect – you just won’t say which one.