religion ... Hindu, Saivite, monistic Saiva Siddhanta, Nandinatha sampradaya, Kailasa parampara
1) Karma, reincarnation, divinity within all, God is formless, and with form
2) same as 1 I guess
3) puja, japa, 16 samskaras
4) individual heads of sampradayas (esoteric schools)
5) love them all...