[ZNPaaneah]

28 Take heed unto yourselves, and to all the flock, in which the Holy Spirit hath made you bishops, to feed the church of the Lord which he purchased with his own blood. 29 I know that after my departing grievous wolves shall enter in among you, not sparing the flock; 30 and from among your own selves shall men arise, speaking perverse things, to draw away the disciples after them.

This is a major boundary -- No one in the church is to draw away disciples after them. In some cases the fault is not with the person, for example in Acts they tried to worship Paul at one point and he had to beg them not to do it. But if they "speak perverse things" with the motive of "drawing away disciples" that crosses the line and is thoroughly condemned.

Denying that Jesus is Lord is a perverse thing. Lord indicates the ultimate authority. When two or three meet in the name of the Lord they are under this ultimate authority. When WL's disciples teach that you need something "more" than this, they are saying that Jesus is not the ultimate authority, they are denying that Jesus is Lord. This is a perverse thing.

The non Biblical reference to WN and WL as "ministers of the Age", using a type of Christ (Moses) to refer to themselves, this is a perverse thing with the intention of drawing disciples after themselves.

3 But not even Titus who was with me, being a Greek, was compelled to be circumcised: 4 and that because of the false brethren privily brought in, who came in privily to spy out our liberty which we have in Christ Jesus, that they might bring us into bondage: 5 to whom we gave place in the way of subjection, no, not for an hour; that the truth of the gospel might continue with you.

Circumcision is very clearly outside of the wall of the fellowship of the apostles. Some may be circumcised, some aren't, some may have been prior to salvation, others can choose to after. But very clearly according to the fellowship of the apostles this has nothing to do with your standing in the church. Circumcision was an OT sign of the covenant between God and man. But Paul makes it clear this OT type is replaced by the reality of the cross of Christ. Our NT sign of a covenant with God is the cross of Christ. If the Judaizers could force gentile converts to be circumcised it would mean they would need something other than the cross of Christ, they would need something more. That would bring the gentile believers into bondage to these Judaizers.