Jews are offended when Christians call the the Torah the old testament. I know this because I have been on several Jewish websites. They totally disagree with the new testament and Christians also. Luke was the only one who was Jewish and he was I think Greek and I read this from the book called men of the bible and who's who in the bible and where's where in the bible.
There is no one "right" religion. There are numerous systems through which people relate to the sacred, giving meaning and order to life. It is up to each person to find their way, and it is abhorrent for anyone to push their own spiritual beliefs on another.
Spirituality is the individual person' s relationship with the sacred. It' s an inner experience, it varies from person to person even more than religions differ from one to another.