Within the Pali canon the Buddha often vigorously debates with Brahmin priests. However in the Buddha's time there were a lot of other spiritual traditions too. Did the Buddha have more cordial relationships with teachers of other faiths too? Are there examples of him working together with spiritual teachers of other traditions? I'm specifically asking about his teaching after he became enlightened. I know he studied with several teachers before that point.
Jatila brothers who had thousand disciples had some relationship with Lord Buddha. But they had evil intentions inside. But Lord Buddha knew their evil intentions. But they soon realized Lord Buddha was superior. Jatila brothers along with their thousand disciples became arhats after listening to Aditta Pariyaya Sutta. You can read the story here. I am unable to recall some other instances where other teachers had good relationships with Lord Buddha, but there must have been.
maybe someone can help me find the reference faster. I remember one sutta, Buddha told someone that a religious leader died and born in deva realm and then further explained that, one with different faith could possibly be born in heavenly realm after death as long as that faith didn't promote; harming/killing other beings, stealing, sexual misconduct, or lying/deceiving others. ( for some reason, he didn't include consuming intoxicants in this sutta).