If by "reject a large portion of the law" do you mean the following:
"For the law was given by Moses, but grace and truth came by Jesus Christ." John 5:45
"Knowing that a man is not justified by the works of the law (of Moses), but by the faith of Jesus Christ, ....that we might be justified by the faith of Christ, and not by the works of the law: for by the works of the law shall no flesh be justified." - Gal. 2:16
Let me give you an example -— I have spoken to many people who call themselves Christians who claim that Jesus’ new commandment is all about “loving” others.
How does that apply in practice, one might ask? Well, take homosexuals for example, it is unloving to condemn their lifestyle because Jesus never mentioned homosexuality even once in the gospels.
What about the law of Moses, one might ask? Well, they tell me that it has been superseded by His command to love one another.
In other words, the moral law of Moses has been replaced by one law — DO THE MOST LOVING THING.
If you love everyone ( gays included ), you have to bless their desire to express their love for people of the same sex as Jesus commanded.
THAT IS WHAT I MEAN when I said : “Many people want to accept Jesus, yet they reject a large portion of the Laws and the Prophets.”