The questions become, that since the tithe was instituted under the Mosaic Law which was given to the Hebrew people, is it to be kept, while the other Laws are not? Are the Hebraic Roots leaders the "new" Levite priesthood, or is that authority and job aligned to "Christian pastors", which some Christians claim also replaces the Levite priesthood?
If the Law of Moses is to be kept for tithing, then the rest of the Law must also be kept, according to the Word of God. That includes the food Laws, clean/unclean, circumcision, stoning rebellious children and stoning those caught in adultery, which includes far too many in leadership and outside of leadership.
Galatians 3:7 Know ye therefore that they which are of faith, the same are the children of Abraham.
8 And the scripture, foreseeing that God would justify the heathen through faith, preached before the gospel unto Abraham, saying, In thee shall all nations be blessed.
9 So then they which be of faith are blessed with faithful Abraham.
10 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: