Is James teaching against obedience?

For whoever shall keep the whole law, and yet stumble in one point,  he is guilty of all.
James 2:10 NKJV

Is James trying to say, "if you violate one Law, you violate it all, so don't even try to fulfill the Law, you have Jesus!!!"

No... James is talking about Partiality against the poor in favour of the rich. It is based on this pretext that led him to talk about "Faith without works is dead". Here are some of the highlights.

The brethrens showing partiality.

My brethren, do not hold the faith of our Lord Jesus Christ, the  Lord of glory, with PARTIALITY. For if there should come into your assembly a man with gold rings, in fine apparel, and there should also come in a poor man in filthy clothes, and you pay attention to the one wearing the fine clothes and say to him, “You sit here in a good place,” and say to the poor man, “You stand there,” or, “Sit here at my footstool,” have you not shown partiality among yourselves, and become judges with evil thoughts?
James 2:1‭-‬4 NKJV

James rebuke for siding with the rich.

Listen, my beloved brethren: Has God not chosen the poor of this world to  be  rich in faith and heirs of the kingdom which He promised to those who love Him? But you have dishonored the poor man. Do not the rich oppress you and drag you into the courts? Do they not blaspheme that noble name by which you are called?
James 2:5‭-‬7 NKJV

Judgement for showing Partiality, lack of Mercy.

If you really fulfill the royal law according to the Scripture, “You shall love your neighbor as yourself,” you do well; but if you show partiality, you commit sin, and are convicted by the law as transgressors. For whoever shall keep the whole law, and yet stumble in one point,  he is guilty of all. For He who said, “Do not commit adultery,” also said, “Do not murder.” Now if you do not commit adultery, but you do murder, you have become a transgressor of the law. So speak and so do as those who will be judged by the law of liberty. For judgment is without mercy to the one who has shown no mercy. Mercy triumphs over judgment.
James 2:8‭-‬13 NKJV

No point praying for the poor when there is no action done.

What does  it profit, my brethren, if someone says he has faith but does not have works? Can faith save him? If a brother or sister is naked and destitute of daily food, and one of you says to them, “Depart in peace, be warmed and filled,” but you do not give them the things which are needed for the body, what does  it profit? Thus also faith by itself, if it does not have works, is dead.
James 2:14‭-‬17 NKJV

Examples of Justification (of Faith)  by works.

But someone will say, “You have faith, and I have works.” Show me your faith without your works, and I will show you my faith by my works. You believe that there is one God. You do well. Even the demons believe—and tremble! But do you want to know, O foolish man, that faith without works is dead? Was not Abraham our father justified by works when he offered Isaac his son on the altar? Do you see that faith was working together with his works, and by works faith was made perfect? And the Scripture was fulfilled which says, “Abraham believed God, and it was accounted to him for righteousness.” And he was called the friend of God. You see then that a man is justified by works, and not by faith only. Likewise, was not Rahab the harlot also justified by works when she received the messengers and sent them out another way? For as the body without the spirit is dead, so faith without works is dead also.
James 2:18‭-‬26 NKJV

Link this to Chapter 1.

Therefore lay aside all filthiness and overflow of wickedness, and receive with meekness the implanted word, which is able to save your souls. But be doers of the word, and not hearers only, deceiving yourselves. For if anyone is a hearer of the word and not a doer, he is like a man observing his natural face in a mirror; for he observes himself, goes away, and immediately forgets what kind of man he was. But he who looks into the perfect law of liberty and continues in  it, and is not a forgetful hearer but a doer of the work, this one will be blessed in what he does. If anyone among you thinks he is religious, and does not bridle his tongue but deceives his own heart, this one’s religion is useless. Pure and undefiled religion before God and the Father is this: to visit orphans and widows in their trouble, and to keep oneself unspotted from the world.
James 1:21‭-‬27 NKJV