Lesser impact, absolutely. Not necessarily false, but without them, what standard would you use to determine sin? What standard would Messiah have to walk by to be perfect?
And as a seperate question, exactly what truth do you find in the Torah?
Just what Messiah said, that they are the scriptures that testify of him and validate who he is. They are the scriptures that tell us how to love YHWH and how to treat our neighbor.
Read Psalm 119 and see what David felt about Torah.
When Paul says not to pay heed to another gospel, I'm sure you pay attention. When YHWH says the same about anyone teaching another Torah, I pay attention. That is why I test all things to see whether they contradict Torah.
Blessings
It would be most helpful and appreciated if you could let us know which of several usages of the word "Torah" is in effect here. You keep using the term, but you never define it for the reader - and it does have more than one meaning within Jewish literature and culture.
It could be used to refer strictly to the Written Law, what we Christians would refer to as the Old Testament (and in some usages "Torah" refers specifically to the five books of Moses). Or (and I find this to be the form used most often) it could be used to include both the Written Law as well as the Oral Law (which is called the Talmud). And there's another, similar possibility that could be considered. You could be specifically referring to Rabbi Maimonides' multi-volume Mishneh Torah, which is more of a Written+Oral+commentary work.
Now if you're using one of the latter forms, it begs the question "which work do you hold to be more authoritative over the other" - the Written Law or the Oral Law? If it's the latter, why?