Which God are we talking about?

My question was about God that Christians believe in, that's why I posted it on Christian Forum, and used a quote from Bible, where an "IF" is in the quote. In some other Bible quotes, the God's love seemed to me like unconditional:
John 4:9-12
"This is how God showed his love among us: He sent his one and only Son into the world that we might live through him.
This is love: not that we loved God, but that he loved us and sent his Son as an atoning sacrifice for our sins.
Dear friends, since God so loved us, we also ought to love one another.
No one has ever seen God; but if we love one another, God lives in us and his love is made complete in us."
Do you think that all religions talk about the same God? Is love of the God you believe in unconditional?