This is in religious debates and so is open to everyone.
In trying to understand Christianity and what underpins it, I keep coming up against essentially the belief that the Torah isn't enough, it's not good enough, it doesn't do this or that.
Psalm 19 says 'The Law of the Lord is perfect', and the Torah in Deut 4 says not to add or take away from it, and in Deut 30 it says it is not far away, hard to do etc.
Can someone please explain to me, if the Torah is perfect, which the Tanakh says it is, why is Jesus or Christianity as a whole necessary? There shouldn't be any need for any 'new' revelation or upgrade, per the Torah itself (it would be adding or taking away).
Can you still have Christianity if you believe the Torah is perfect? I don't believe you can.
I'm pleased that you've raised this issue.
Paul is often criticised as the apostle who leads people astray, and teaches something that is not consistent with either Jesus or the Law. I am convinced that this is wrong. One only has to read Paul's epistles to know that he never had a bad word to say about God's commandments.
1 Timothy 1:5-8. 'Now the end of the commandment is charity out of a pure heart, and
of a good conscience, and
of faith unfeigned:
From which some having swerved have turned aside unto vain jangling;
Desiring to be teachers of the law; understanding neither what they say, nor whereof they affirm.
But we know that the law
is good, if a man use it lawfully;'
The law is good, and is intended to keep people from transgressing from the path of righteousness.
Jesus did everything commanded by the law, and he did it with a pure heart. He is, therefore, the righteousness of God.
It's the teaching of scripture that all men are sinners, and no man is pure of heart. Consequently, we need to be washed by the blood of Christ if we are to become righteous in the eyes of God. This is why we all need the Holy Spirit baptism offered by Christ. [IMO]
By faithfully following a person (Jesus Christ) who has fulfilled all righteousness, we enter a new covenant. The same moral commandments apply, but the law is fulfilled through God's grace, rather than by man's works.