Hinduism is not one church, one creed, or one central authority. A Hindu neighbor may be Vaishnava, Shaiva, Shakta, Smarta, Advaita, Dvaita, bhakti-oriented, temple-centered, yoga-centered, reform-minded, or shaped mainly by family practice and festival life. Some Hindus speak devotionally of one chosen deity; others speak philosophically of Brahman, atman, or ultimate reality; many combine inherited practice, family duty, and broad respect for multiple paths.
A fair conversation starts by asking what the person actually believes and practices. Avoid reducing Hinduism to “polytheism” or to a fixed number of gods. Also avoid assuming that a Hindu who honors Jesus already means what Christians mean by incarnation, Lordship, sin, grace, cross, and resurrection.