Outside of the liberal teachings of our day, where does it say that? Its a slogan that I was never taught pre Vatican 2 and with good reason I think. These days, such thinking leads to either hating both or loving both. And since any hating of the sin automatically will get the hater accused of "judging", that leaves only room for the socially acceptable loving both the sinner and the sin.
The other thing is, in the process of loving the sinner, somehow the messaage got all screwed up that we hate the sin and find it detestable. The modernist folks and obstinate sinners love to tout that slogan and push it as though it were words to live by, but it seems to me that because of that slogan, we do not hate the sin for if we did hate the sin, we would not support the sinner in it - at the absolute very least, we would discourage the sinner from publicly declaring it - no?
Another reason that slogan is so popular is because today, the overwhelming emphasis is on all that "love thy neighbor" crap thats taken completely out of context - in the mean time, no one is teaching that the love of God is our primary endevor, and with that love will come our love of neighbor.
Jesus says: "Thou shall love the Lord thy God with thy whole heart, and with thy whole soul, and with thy whole mind." (Matt. 22:37.) Before He passes to the second commandment, Jesus tells us about the first:
"This is the greatest and the first commandment."
Do not touch one single phrase of the next commandment until you have fully comprehended and understood this first one!
Our Lord then goes on: "And the second is like to this: Thou shalt love thy neighbour as thyself." (Matt. 22:39.)
In their haste to fulfill the second commandment, which, btw, includes the proper reprimanding of the obstinate sinner as necessary, too many people, including our clergy, neglect the first - and greatest commandment. Reprimanding is not hating, regardless of what the sinner has to say about it.
I strongly disagree. Both the duty of loving one's neighbor and the sinfulness of homosexual activity (or indeed any sex outside of marriage) are part and parcel of the deposit of faith, taught in both Scripture and Tradition from the apostolic times. This "slogan" encapsulates nicely both prongs of the teaching, and is a good mnemonic that helps us not forget either of these fundamental teachings.
Excellent comments. Example - does a loving parent punish or chastise the child who does wrong, for the child's own good? Or does the loving parent never discipline the child, no matter how serious or dangerous the misbehavior?
Of course, God is the Parent, but if we want to be His servants, we should follow His example and instruction. Love doesn't always mean sweet words and hugs. Love means telling the truth, even if unpopular. And it usually is.
I also agree with your position that love for others is the overflow from love for God. We actually cannot in truth love anyone until our hearts are filled with love for God, since that love is actually His love coming through us. The more actual love for God someone has, the more compassion and mercy they have for others, even if the "others" aren't perfect. That love is in connection with God the Father. And, of course, there is Tough Love as well.
People who think there can be real love for the creatures while ignoring or dissing God is experiencing sentiment only, not love based on wisdom. Such sentiment is often very misleading and can take a person very far away from God, since it is exclusive. For instance, a person may "love" their pet cat, and hate their own family. Or the misguided parents who "love" their homosexual children so much that they applaud their sick behavior and participate in "Gay" Pride parades. And such people of course villify those who would actually help their deviant sons and daughters become healed.
What kind of love is that?