As a Christian, and as a decent human being, I’m going to love everyone. But I refuse to tell someone who is deliberately living in sin that that is okay. We’re supposed to deny ourselves and take up our cross, not continue living in sin because God still loves us. He’s going to love us no matter what we do, but that doesn’t give us any right to abuse His love and mercy.
There is one war all Christians should be fighting; the war for the souls of the lost. Do not sit back and watch them flounder in the dark, don't keep them there by justifying or condoning the sin they are drowning in. Rather use your light to guide them to Him, help pull them out of the muck.