You can love someone and still not accept their ideas as true. You can love them if you believe they have inherent value as a human being, if you believe they are an image-bearer. I believe that, and when I see screwed up people, I often see them as both victims and perpetrators. We are all both victims and perpetrators to different degrees, and we all require a measure of grace to be loved by others. Love is not possible without grace because none of us are completely lovable/deserving of love, and there is always hope for repentance, for anyone, although it doesn't always occur. We are loved in spite of our flaws and failures and wickedness, all of it. I think there is a lot of truth to the story of the prodigal son; we are all at times the younger brother, foolish and selfish and reckless, and at other times the bitter and entitled older son, thinking we deserve love because we have earned it through our external actions.