In the Name of Allah, the All-Merciful, the Mercy-giving

 

All praise is due to Allah. Peace and blessings be upon Prophet Muhammad.

 

Islam is the religion of pure tawheed (pure monotheistic belief) in Allah. Allah is One and has no partners or equals. Almighty Allah says, “Say: He is Allah. One. Allah, the Everlasting Refuge. He does not beget. Nor is He begotten. And comparable to Him, there is none.” (Al-Ikhlas 112:1-4)

 

A Muslim has to renounce all other gods and all forms of worship directed to other than Allah as in the Quranic injunction “Say, [O Prophet]: O you [inveterate] disbelievers! I do not worship what you worship. Nor are you worshippers of what I worship. Nor shall I ever be a worshipper of what you worship. Nor shall you ever be worshippers of what I worship. For you is your religion. And for me is my religion.” (Al-Kafirun 109:1-6)

 

You need to keep good relation with your non-Muslim family in order to invite them to Islam, but this may not be at the expenses of your faith and belief.

 

Allah says in the Quran, “Neither your relatives nor your children will benefit you on the Day of Resurrection. He shall separate [the evil from the righteous] among you. For Allah is all-seeing of all that you do. There is truly an excellent model for you in [the firm stand of] Abraham and those with him when they said to their [idolatrous] people: We are free of [association with] you and [with] all that you worship, apart from Allah.  We have disbelieved in you. Thus [open] enmity and hostility have commenced between us and you forever, until you believe in Allah alone.” (Al-An`am 6:4)

 

Allah is the Name of the only Creator and Sovereign of this universe. He has many other sublime names, not including Shiva. Shiva is a Hindu deity, not Allah. In the holy Quran we read, “Yet to Allah belong the most excellent names. So call upon Him with them. And leave [alone] those who profane His names. They shall be [duly] recompensed for all that they have done” [7:180] and also we read “There is nothing that is anything like Him.” (Al-Shura 42:12)

 

Associating other gods in worship with Allah, serving other gods, and visiting their temples are unforgivable sins. Allah says, “Indeed, Allah will not forgive associating any god with Him. But He forgives anything less than this for whomever He so wills. For whoever associates gods with Allah has truly forged a great sin.” (An-Nisaa 4:48)

 

You need to read more about the concept of tawheed in Islam. The Quran is all about tawheed. The more you read and contemplate on its verses, the stronger will become your belief and clearer will be the Islamic concept of tawheed.

 

May Allah guide you to the true faith and sound belief.

 

Almighty Allah knows best.