Okay, Anti-Theist with a bible hub link to the rescue. I have no dog in this fight.:

Okay, Lapalapa is claiming what he's talking about is John 15:12

My command is this: Love each other as I have loved you. [New International Version]

Here's more of the context. He does seem to be talking to his deciples before his imminent and predicted death.

As the Father has loved Me, so have I loved you. Remain in My love. If you keep My commandments, you will remain in My love, just as I have kept My Father’s commandments and remain in His love. I have told you these things so that My joy may be in you and your joy may be complete.

This is My commandment, that you love one another as I have loved you. Greater love has no one than this, that he lay down his life for his friends.

You are My friends if you do what I command you. No longer do I call you servants, for a servant does not understand what his master is doing. But I have called you friends, because everything I have learned from My Father I have made known to you. You did not choose Me, but I chose you. And I appointed you to go and bear fruit—fruit that will remain—so that whatever you ask the Father in My name, He will give you. This is My command to you: Love one another.

Okay, from the context I'm seeing here, including John 12, 13, and 14, it seems like when Jesus says "love", he's referring to the specific kind of love that he gives to his disciples. It's not just being all sweet and kind, but it kind of seems like it's a bond of obligation between Jesus and his disciples where Jesus is trying to educate them and lead them into understanding how the world is supposed to work, while trying to protect and care for them. In turn, the disciples are needed to listen to him and try and emulate moral and righteous actions.

I guess the point here is that you can't remain in God's love and recieve the blessings of a moral life if you sin... which would be reasonable.

Additionally, I found the "love the sinner" concept appears to have come from St. Augustine instead of Ghandi, which is according to "CatholicAnswers.com"

It’s from St. Augustine. His Letter 211 (c. 424) contains the phrase Cum dilectione hominum et odio vitiorum, which translates roughly to “With love for mankind and hatred of sins.” The phrase has become more famous as “love the sinner but hate the sin” or “hate the sin and not the sinner” (the latter form appearing in Mohandas Gandhi’s 1929 autobiography).

I'd need to see more of his letter to know the context.