In Jain dharma, the main issue is not the name of the dev/Devi, but:

• What is your belief about them?
• What do you expect from them?
• Do they take the place of Arihant–Siddha–Sadhu–Shrut (Panch Parmeshthi) in your heart?

So, is it “sin” to worship Ganpati, Krishna, Shiv, Ambe Maa?

1. From pure Jain viewpoint (samyak darshan)

According to Jain philosophy:

• Only Arihant and Siddha bhagwan are the final goal.
• Indra, Ganpati, Krishna, Shiv, Amba etc. (as commonly worshipped in Hindu tradition) are not Tirthankar / Siddha. They are at most high devas or great souls within samsar (cycle of birth–death).
• To believe that any dev or Devi will:

- remove our sins, - give moksha, - change our karma just by their wish is called mithyātva (wrong belief) and comes under moha karma. ( jainknowledge.com)

So, if your faith is like this: “Ganpati/Krishna/Shiv/Amba are supreme God, they give moksha, they are above Arihant/Siddha” → this is wrong belief, spiritually harmful for a Jain.

2. What if I already did/was doing such worship?

• Past actions done in ignorance create karma, but Jain dharma always gives chance for prashchit (repentance) and correction.
• You can:

- Accept calmly: “I did this out of ignorance / family habit.” - Do pratikraman (mental repentance) and take a small vrat: “From now, I will keep Panch Parmeshthi as my main refuge.” - Slowly reduce emotional dependence on such dev/Devi.

Jainism never teaches guilt and fear; it teaches understanding and change.

3. If you are forced by family / social pressure

Many Jains face:

• At home / in society: Ganpati sthapana, Krishna Janmashtami, Shiv ratri, Navratri Garba, Ambe maa aarti, etc.

In such situations:

• Externally: You may stand, join respectfully to maintain family harmony (if you cannot avoid).
• Internally: Keep dradh bhav:

- “My real sharan is only Arihant–Siddha–Sadhu–Shrut.” - Mentally remember Namokar Mantra while others do aarti/garba.

• Try calmly to explain Jain view at home when the time is right, without anger or insult of their devtas (that also creates pap through harsh speech).

This keeps you away from hard mithyātva, and gradually family also understands your path.

4. Clear Jain guideline (simple)

1. Highest worship:

- Arihant bhagwan - Siddha bhagwan - Sadhu/Sadhvi (true muni/aryika) - Jin-vani (Agam, scriptures)

1. Allowed with understanding:

- Yaksh/Yakshini like Ambika, Padmavati, Chakreshwari etc., as Jain shasan dev–devi, only as helpers, not as givers of moksha. ( en.wikipedia.org)

1. To be avoided:

- Treating Ganpati, Krishna, Shiv, Ambe Mata (in non‑Jain form) as: - “Supreme God over all” - “Direct giver of moksha” - “One who will cancel my karma if I just pray”

This is mithya shraddha and becomes a cause of spiritual fall.

5. Practical way forward for you

• Don’t panic: “I did a big sin” and go into depression. That again strengthens moha.
• Do this calmly:

1. From today, fix in heart: “My final goal is only moksha; my only ultimate refuge is Panch Parmeshthi.” 2. Daily, with feeling, recite Namokar Mantra and bow to Arihant–Siddha. 3. Gradually reduce non‑Jain pooja where you have full freedom (your own room, your own decisions). 4. Where you cannot avoid (family events), stay with inner Jain drashti and avoid making personal vows like “Ganpati, you only give me moksha / you are everything”, etc.

If you wish to read more on right faith and mithyātva, you can see this explanation on right faith and right knowledge on JainKnowledge

In summary:

• Yes, making these devas your ultimate God and saviour goes against Jain samyak darshan and is spiritually wrong.
• But Jain dharma gives you a gentle path: understand, repent inside, and now lovingly turn your worship towards Arihant–Siddha and true Jain dev–devis.