Jesus is not adding requirements for salvation; although most true believers do love Jesus above all else.
Jesus is making a case that nobody is worthy of Him; and that Salvation can't be earned. Salvation must be accepted as a free gift totally unearned.
What did Jesus say about loving God.
If anyone comes to me and does not hate father and mother, wife and children, brothers and sisters—yes, even their own life—such a person cannot be my disciple.
Luke 14:26
There is nothing that can come higher in ones heart than God to be a disciple.
It is because He is above any mortal issue we have in our lives, and to compromise
this is to compromise God and sin.