The Catholic Church does not reject those who identify as homosexual. The Church condemns the sin, not the sinner as the Church recognises that we are all sinners. It would not be showing love to those with a strong temptation to steal or to commit violence against persons, if the Church affirmed such people in their sins. In fact it would be a grievous dereliction of its duty and a grave injustice if the Church were to do so. In such cases it is actually really loving to explain to people how and why their conduct is offensive to God and to show them that with God's grace it is possible to live a life in accordance with the commandments and thus pleasing to God.

We are all called to obey the commandments. All. They are meant for our happiness after all. It would certainly NOT be showing love to those who identify as homosexual to affirm their sexual behaviour as in the guise of a false 'mercy' one would in fact be consigning them to pain and misery now and possibly for eternity.