Gods belonging to other religions

I’m not religious, I’m just curious. I find it fascinating to learn about all different religions and cultures. My question is aimed at religious people.

Do you believe that other gods apart from the one you worship exist, but they are the wrong God to follow? Or do you believe in only the God that belongs to your religion?

For example: if you are Christian, do you believe that the God that say Hindus worship, exist at all? Or do you think only your God has ever existed?

I hope this makes sense!