The Jews, like all people were made in the image of God. To love them is to love Christ, as it was Christ who said, "Verily I say unto you, Inasmuch as ye have done it unto one of the least of these my brethren, ye have done it unto me."
And it was Jesus Christ who said, "A new commandment I give unto you, That ye love one another; as I have loved you, that ye also love one another. By this shall all men know that ye are my disciples, if ye have love one to another."
Who Saint Paul who rightly interpreted, "Now the end of the commandment is charity out of a pure heart, and of a good conscience, and of faith unfeigned."
As well as Saint John the theologian when he wrote..
"Beloved, let us love one another: for love is of God; and every one that loveth is born of God, and knoweth God.
He that loveth not knoweth not God; for God is love.
In this was manifested the love of God toward us, because that God sent his only begotten Son into the world, that we might live through him.
Herein is love, not that we loved God, but that he loved us, and sent his Son to be the propitiation for our sins.
Beloved, if God so loved us, we ought also to love one another.
No man hath seen God at any time. If we love one another, God dwelleth in us, and his love is perfected in us.
Hereby know we that we dwell in him, and he in us, because he hath given us of his Spirit.
And we have seen and do testify that the Father sent the Son to be the Saviour of the world.
Whosoever shall confess that Jesus is the Son of God, God dwelleth in him, and he in God.
And we have known and believed the love that God hath to us. God is love; and he that dwelleth in love dwelleth in God, and God in him."
And so to love even those who curse and revile you, even the heretics and the godless... is to love Christ Himself, as we are all bearers of that image, even if this image has been obscured by the filth that is our sin.