love the sinner (but) hate the sin
You can love someone even if there is an aspect of their behavior or lifestyle that you feel that you cannot condone. A: "I always try to live by 'love the sinner but hate the sin' when people do things I don't agree with." B: "Wow, how magnanimous of you." My parent's are quite conservative in their religious beliefs, so when my sister came out as gay, they adopted a view of "love the sinner, hate the sin."
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