Romans 16:17
Now I beseech you, brethren, mark them which cause divisions and offences contrary to the doctrine which ye have learned; and avoid them.
Here is the deal...we are to Love the sinner, but hate the sin. An example is that homosexuals are people too, we should not treat them unfairly because of what they do...but if they think that they can freely promote there agenda, I have every right to plainly say that homosexual practices are an abomination , and in at least two Bible passages GOD includes 'homosexual behavior' in with the list of bad things that should not be done.
1 Corinthians 6:9-10
9 Or do you not know that wrongdoers will not inherit the kingdom of God? Do not be deceived: Neither the sexually immoral nor idolaters nor adulterers nor men who have sex with men 10 nor thieves nor the greedy nor drunkards nor slanderers nor swindlers will inherit the kingdom of God.
Galatians 519-21
19 The acts of the flesh are obvious: sexual immorality, impurity and debauchery; 20 idolatry and witchcraft; hatred, discord, jealousy, fits of rage, selfish ambition, dissensions, factions 21 and envy; drunkenness, orgies, and the like. I warn you, as I did before, that those who live like this will not inherit the kingdom of God.
(Note a person might be tempted by thinking of homosexual thoughts, and a person needs to resist continually thinking about such thoughts, it the same as a person might be tempted by killing someone (its more common than some people might think) however a person should not be constantly planning out how they are going to kill people. And certainly, a person should not preform a homosexual act, or a murderous act.