Why does the Qur’an mention repeatedly that Allah loves the believers and does not love the disbelievers, are they not all His slaves?

Allah Almighty guided all His slaves to the way of salvation and He does not approve of disbelief for them. However, He does not love the wrong attitude itself that man adopts by disbelief or causing corruption on earth.

{If you disbelieve, then Allah is in no need of you, but He does not approve of disbelief for His slaves. If you are grateful, He approves that for you. No bearer of burden can bear the burden of another. Then to your Lord is your return, and He will inform you of what you used to do. He is All-Knowing of what is in the hearts.} [316] Surat az-Zumar: 7.

What would we say about a father who keeps telling his children that he will be proud of them all if they steal, commit adultery, kill, and cause corruption on earth and tells them that he considers them like the righteous worshippers? Simply the best description of such a father is that he is like a devil encouraging his children to spread corruption on earth.