Let's just look at the Christian Scriptures, the NT. I don't see anywhere that it supports any other religion other than Judaism, and Christians veered a long way away from Judaism. Satan, hell, and salvation seems to be what it's all about. They connect their Scriptures onto the Hebrew Bible, but they don't follow it.
Okay, what other religion, other than the Baha'i Faith, do Baha'is believe to be teaching and practicing the truth from God? I don't think Baha'is believe any of them have the truth, are teaching the truth, and are practicing the truth. Am I wrong?
We follow or try to, the spiritual teachings and virtues of all religions as we believe they are eternal. So we believe in the spiritual teachings in the Torah, the Gospels, the Quran, the Bhagavad-Gita and Buddhist scriptures as well as the Bab and Baha’u’llah.
To define it more clearly we are looking at things like the Ten Commandments, the Beatitudes of Jesus, to love and forgive one another, to love God which is taught in the Gita, the virtues taught in the Quran such as to repel evil with good and the Dhammapadda and Baha’i and Bab’s Writings.
If you examine the spiritual teachings of each religion, they all complement one another.
That’s why we read from the Holy Books of all the major religions in our services and why their symbols are engraved into the architecture of all our Houses of Worship.
Only in the social laws such as for crimes, some dietary laws, marriage etc these were given for the age but as each new Prophet appeared He adapted the laws to suit the needs of the age.