How is God's love "unconditional"?

It's unconditional under the condition that you believe he exists without any evidence, otherwise his uncondional love becomes VERY conditional indeed, and you get to roast in hell for ever, and ever, and ever, and ever, and ever, etc. because you made a mistake during a 75 year lifespan...... even if you gave everything to charity and spent your whole life in poverty working to serve others, you still burn FOREVER because you had a rough time believing in an invisible god who doesn't give any signs of his existance and who's "holy" word is full of nonsense and contradictions. Ahhh... a father's love.........