The GB/WTS/FDS sounds like the early Christians Paul called false brothers who demeaned his anointing. From the GB own writings:
*** it-1 pp. 606-607 Declare Righteous ***Certain men, falsely claiming to be apostles, unjustly challenged the apostleship and Christian works of Paul, seeking thereby to draw away the Corinthian congregation to themselves. (2Co 11:12, 13) Paul, knowing that he was faithfully carrying out a stewardship for Christ, stated that he was not concerned with the judgment of men who, wholly unauthorized, sat in effect as a “human tribunal” to judge him. He did not even rely on his own judgment of himself, but he looked to Jehovah as his Examiner. (1Co 4:1-4) Thus the principle is set forth that reliance cannot be put in the judgment of men as to one’s righteousness or lack of it, unless their judgment is backed up by God’s Word.
*** it-1 p. 818 Fault, Faultfinding ***Men who were challenging Paul’s apostleship had associated with the congregation there and had indulged in much faultfinding and slander against Paul in order to belittle him and to destroy his apostolic authority over the congregation. Realizing this and knowing also the danger of faultfinding and trouble where money matters are concerned, he assured the congregation that he was sending Titus and another trustworthy brother appointed by the congregations to handle the contributions. “Thus,” wrote Paul, “we are avoiding having any man find fault with us in connection with this liberal contribution to be administered by us.”—2Co 8:16-21.
*** it-1 p. 882 Galatians, Letter to the ***The Judaizers were crafty and insincere. (Ac 15:1; Ga 2:4) Claiming to represent the congregation in Jerusalem, these false teachers opposed Paul and discredited his position as an apostle. They wanted the Christians to get circumcised, not seeking the Galatians’ best interests, but so that the Judaizers could bring about an appearance of things that would conciliate the Jews and keep them from opposing so violently. The Judaizers did not want to suffer persecution for Christ.—Ga 6:12, 13.
To accomplish their objective, they claimed that Paul’s commission came to him secondhand, that it was only from some men prominent in the Christian congregation—not from Christ Jesus himself. (Ga 1:11, 12, 15-20) They wanted the Galatians to follow them (4:17), and in order to nullify Paul’s influence, they had to paint him first as no apostle.
*** it-2 p. 292 Madness ***
IllustrativeUse.The apostle Paul’s authority and apostleship were challenged by some in Corinth whom he sarcastically termed “superfine apostles.” (2Co 11:5) In order to bring the Corinthian congregation to their senses, Paul “boasted” about his credentials, his blessings and the things he had experienced in Jehovah’s service, proving his claim. This boasting was contrary to the usual speech of a Christian, but Paul had to do it in this case. Hence he spoke of himself as though being ‘out of his mind’and said of the so-called superfine apostles: “Are they ministers of Christ? I reply like a madman, I am more outstandingly one.”—2Co 11:21-27.
Even this was said about Jesus:
(Mark 3:21) But when his relatives heard about it, they went out to lay hold of him, for they were saying: “He has gone out of his mind.”