Do you understand the post ?
12 As many as desire to make a fair shew in the flesh, they constrain you to be circumcised; only lest they should suffer persecution for the cross of Christ.
13 For neither they themselves who are circumcised keep the law; but desire to have you circumcised, that they may glory in your flesh.
14 But God forbid that I should glory, save in the cross of our Lord Jesus Christ, by whom the world is crucified unto me, and I unto the world.
do you understand what it is that God wants us to know when we read Gal 6:14? do you even care?
Do you understand that at that time, those who did not want to suffer persecution for the cross of Christ would advocate circumcision so they could avoid persecution, not only from the Jews but also from the Romans?
From Pulpit Commentary:
And herewith we have to bear in mind also that Judaism was in Roman jurisprudence treated as a tolerated religion (religio licita); and that, as long as Christians were regarded as belonging to a sect or branch of Judaism, they might seem to be entitled, in the eyes of Roman law, to the same toleration as the Jews themselves enjoyed. But if the Jews cast them off or disowned them they might forfeit such immunity, and become liable to be treated, not only by mobs, but by the Roman law itself, as offenders. The persons, then, here censured by the apostle may be supposed to have pursued the course they did with the idea that, by making themselves acceptable to the Jews through the adoption to a limited extent of Jewish ceremonies, and especially through the acceptance in their own person and the urging upon others of circumcision, they would relieve themselves of "the offence of the cross".
Those who constrained the believers to be circumcised were not interested in the things of God.
We see the same thing going on in our day and time with issues wherein some who call themselves believers, yet embrace and push for acceptance of behaviors/activities which God clearly states are an abomination to Him.
God's Word tells us we are going to suffer persecution, we are going to go through trials and affliction because of our faith in the Lord Jesus Christ ...
1 Peter 4:
12 Beloved, think it not strange concerning the fiery trial which is to try you, as though some strange thing happened unto you:
13 But rejoice, inasmuch as ye are partakers of Christ's sufferings; that, when his glory shall be revealed, ye may be glad also with exceeding joy.
14 If ye be reproached for the name of Christ, happy are ye; for the spirit of glory and of God resteth upon you: on their part he is evil spoken of, but on your part he is glorified.
15 But let none of you suffer as a murderer, or as a thief, or as an evildoer, or as a busybody in other men's matters.
16 Yet if any man suffer as a Christian, let him not be ashamed; but let him glorify God on this behalf.