This view regarding the Hebrew Roots movement is based off of Paulinism. Many Christians place Paul as essentially a translator for what Jesus said in the Gospels. In other words, they put his words before Jesus.
If you read Jesus's Gospels alone, or even the NT apart from the Pauline epistles, you'll find a different view on what they teach. They are NOT sola fida (Faith alone), like what some verses in Pauline epistles seem to explicitly indicate.
Not only this, but Paul's epistles directly contradict Jesus's teachings in the Gospels and Revelations.
Jesus Words Only.com has a lot of great articles on this. Some examples:
Luke (the writer of the Gospel of Luke along with Acts) in Acts believed that Paul was still a follower of the Law (of the OT), as that's why he recorded Paul saying this:
Acts
21:14 However, I admit that I worship the God of our ancestors as a follower of the Way, which they call a sect. I believe everything that is in accordance with the Law and that is written in the Prophets
However, as you can read in Paul's epistles, he says, in a very convoluted way, that we are to no longer follow the Old Testament law, and this is what mainstream Christianity teaches today.
This clearly contrasts with what Jesus said in Matthew
5:17-19, as well as in Luke 16:
Luke
16:17 "But it is easier for heaven and earth to pass away than for one stroke of a letter of the Law to fail.
Matthew 5: 17 “Do not think that I have come to abolish the Law or the Prophets; I have not come to abolish them but to fulfill them. 18 For truly I tell you, until heaven and earth disappear, not the smallest letter, not the least stroke of a pen, will by any means disappear from the Law until everything is accomplished. 19 Therefore anyone who sets aside one of the least of these commands and teaches others accordingly will be called least in the kingdom of heaven, but whoever practices and teaches these commands will be called great in the kingdom of heaven.
And also: Matthew 23: 23 Then Jesus said to the crowds and to his disciples: 2 “The teachers of the law and the Pharisees sit in Moses’ seat. 3 So you must be careful to do everything they tell you. But do not do what they do, for they do not practice what they preach. 4 They tie up heavy, cumbersome loads and put them on other people’s shoulders, but they themselves are not willing to lift a finger to move them.
Paul also said it is ok if we eat meat sacrificed to idols out of ignorance, and that we should willingly try and remain ignorant to whether the food we eat was sacrificed to idols, whereas Jesus said we can't eat them at all in Revelation, and in Acts the council at Jerusalem said we weren't supposed to either.
Jesus also praised the church of Ephesus in Revelation for rejecting false prophets, and this is the same church that Paul said rejected him:
Paul claimed to be an apostle in his letter to the Ephesians (Ephesians 1:1). Ephesus was the largest city of Proconsular Asia -- modern Western Turkey. However, later on, in Paul's second letter to Timothy, Paul declared that "all those in Asia have turned away from me" (2 Timothy
1:15).
In Acts 19, Luke tells us the Ephesian synagogue where Paul taught for three months and where there were substantial converts to Christ finally expelled Paul.
Acts 19: 8 Paul entered the synagogue and spoke boldly there for three months, arguing persuasively about the kingdom of God. 9 But some of them became obstinate; they refused to believe and publicly maligned the Way. So Paul left them. He took the disciples with him and had discussions daily in the lecture hall of Tyrannus.
Now, what did Jesus say to the Ephesians in Revelation? 2 “To the angel[a] of the church in Ephesus write: These are the words of him who holds the seven stars in his right hand and walks among the seven golden lampstands. 2 I know your deeds, your hard work and your perseverance. I know that you cannot tolerate wicked people, that you have tested those who claim to be apostles but are not, and have found them false."
If Jesus was on Paul's side, why would He praise the church that had rejected Paul?