At this point in time, I do believe the Jews to be on the same level as the Muslims (i can hear them both screaming about that). There is one way of salvation and that is through Jesus Christ. The Jews, as a group, rejected the Messiah.
Anyone can “acknowledge” a creator. The Indians acknowledge “mother earth,” the pagans “acknowledge” the goddess sophia.
And the Muslims may “profess” the faith of Abraham, but they are confused because Abraham was a model of faith, according to Hewbrews 11:8-11, I believe. Abraham’s faith was in the God of the bible, and in the Messiah, Jesus Christ, as he was given the light to understand it. But Muslims DENY Jesus Christ. It this day and age there is no excuse for that. Back in Old Testament times some of this was like “seeing through a glass darkley.” But there was no DENYING the Truth.
To back up some, I DO through the Jews onto the same level as the Muslims. Or, to be more correct, the Jews throw themselves to the same level as the Muslims. They both deny Jesus Christ. I don’t make the rules or it’s not my plan of salvation and I go by what the revealed, written Word of God says. And along with all the great Fathers of the Church, where tradition contradicts Scripture, it is the scripture that sets one straight. That’s why God had His word in written form. So doctrine could be objectively verified. How many times have you heard people say something like “the Lord told me to do this or that or believe this or that.” Well, if it contradicts the written Word, throw it out.
A lot of Christians don’t understand the Trinity, but they don’t deny it–unless they are mumbling the Nicene Creed or the Apostles Creed and just going through the motions. If that is the case, they might as well remain silent.