This is where we absolutely positively disagree. Achieving salvation by observing Torah is out, that's true.  But for a Jewish Catholic to obey Torah?  That's perfectly within Catholic teaching, as I've already discussed, and offered you the Hebrew Catholic website.
		
		
	 
This is the error of the Pharisee's.  Yeshua's tells them this when he says to them that:
You search the Scriptures because you think that in them you have eternal life; it is these that testify about Me; 
40 and you are unwilling to come to Me so that you may have life. 
41“I do not receive glory from men; 
42 but I know you, that you do not have the love of God in yourselves. 
43“I have come in My Father’s name, and you do not receive Me; if another comes in his own name, you will receive him. 
44“How can you believe, when you receive glory from one another and you do not seek the glory that is from the 
one and only God? 
45“Do not think that I will accuse you before the Father; the one who accuses you is Moses, in whom you have set your hope. 
46“For if you believed Moses, you would believe Me, for he wrote about Me. 
47“But if you do not believe his writings, how will you believe My words?”
No man, woman or child in all of mankind's history has EVER been saved by Torah.  ALL have been saved the same way.  By FAITH through Grace
It is IMPOSSIBLE for man to be married (spiritually speaking) and become echad with G-d in his fallen state.
Natural man is already married to the law of sin and death.  For him in this state to attempt to become 1 with the Father is to commit spiritual adultery.  Since man is echad 1 with his fallen nature and is "married" to the law of sin and death God could and would NEVER allow his Son Yeshua to take a man or woman as his bride.
The ONLY way a man or woman can become the bride is to be released from is prior union under the Torah.  That means that someone must die.  That someone is US.  We must come to G-d in faith and accept Yeshua's sacrifice and BELIEVE that we DIED with Messiah.  Only then are we that new creature Paul speaks of!  This new creature is a VIRGIN and this new creature IS qualified to be the bride who can be presented before Messiah without spot or wrinkle.
As this new creature who is betrothed to Messiah we must be on guard as Yeshua warned his followers to beware of the leaven of the Pharisee's
As HIS betrothed we must be on guard to not commit spiritual fornication!