If you want to argue that Jewish law is restrictive fine... Christians agree. It's written in the new testament. I'll leave it to a Jew to defend their laws.
The fact that anyone thinks Christians believe in following Jewish law speaks more to lack of education, not anything to do with Christianity.
Edit: i will point out these forms of Christianity also reject the authority of the bible in the way most protestants see it.
> Slaves, obey your earthly masters with deep respect and fear. Serve them sincerely as you would serve Christ. Ephesians 6:5
> Slaves, be subject to your masters with all reverence, not only to those who are good and equitable but also to those who are perverse. 1 Peter 2:18
> The women are to keep silent in the churches; for they are not permitted to speak. 1st Corinthians 14:34
> You should not use outward aids to make yourselves beautiful, such as the way you fix your hair, or the jewelry you put on, or the dresses you wear. 1st Peter 3:3
> So if your eye—even your good eye—causes you to lust, gouge it out and throw it away. Matthew 5:29
> Don’t store up treasures here on earth, where moths eat them and rust destroys them, and where thieves break in and steal. Matthew 6:19
> Whoever marries a divorced woman commits adultery. Matthew 5:32
> So then, none of you can be My disciple who does not give up all his own possessions. Luke 14:33
> A woman should learn in quietness and full submission. I do not permit a woman to teach or to assume authority over a man; she must be quiet. For Adam was formed first, then Eve. And Adam was not the one deceived; it was the woman who was deceived and became a sinner. But women will be saved through childbearing—if they continue in faith, love and holiness with propriety. 1st Timothy 2:11-15
> Does not the very nature of things teach you that if a man has long hair, it is a disgrace to him, but that if a woman has long hair, it is her glory? For long hair is given to her as a covering. If anyone wants to be contentious about this, we have no other practice—nor do the churches of God. 1 Corinthians 11:14-16
These are every single one from the New Testament, and I don't know a single Christian who actually really follows any of these verses. And good thing, too. I don't want them to. If they did, then, again, the world would be worse off.
Mother Theresa did not try to run a hospital, but a hospice. Having visited India and seeing street conditions, letting people die with dignity providing them basic necessities is preferable to the deaths I saw on the street.
Perfect should not be the enemy of better.