“They must be accepted with respect, compassion, and sensitivity. Every sign of unjust discrimination in their regard should be avoided.” -Catechism of the Catholic Church, sect 2, ch 2, art 6 “Chastity and Homosexuality” line 2358.
NOTHING about being Catholic justifies you from discrimination against another human being, including someone that is gay.
Feel free to check yourself: http://www.scborromeo.org/ccc/p3s2c2a6.htm
