Those in the New IFB need to preach law keeping because many in their congregations do not have the holy spirit.
Gal 5:16-18 This I say then, Walk in the Spirit, and ye shall not fulfil the lust of the flesh. (17) For the flesh lusteth against the Spirit, and the Spirit against the flesh: and these are contrary the one to the other: so that ye cannot do the things that ye would. (18) But if ye be led of the Spirit, ye are not under the law.
Gal 3:10-13 For as many as are of the works of the law are under the curse: for it is written, Cursed is every one that continueth not in all things which are written in the book of the law to do them. (11) But that no man is justified by the law in the sight of God, it is evident: for, The just shall live by faith. (12) And the law is not of faith: but, The man that doeth them shall live in them. (13) Christ hath redeemed us from the curse of the law, being made a curse for us: for it is written, Cursed is every one that hangeth on a tree: