Non-Christians? Well, that now goes to the original Apostles, who knew the Masoretic Text. Paul the Apostle, a Pharisee, was especially reliant on the Masoretic Text.
Simply false. The NT is more similar to the LXX than the MT 85% of the time. If you want to understand modern Judaism, read the MT. If you want to understand the religion of the apostles, read the LXX.