By our actions in trying to live like a life like Christ.
We ask God to guide us in our lives and we do good deeds to all people no matter who they are, even if they are your enemy and you disagree with their lifestyle. As a Christian, we need to truly love all people, including people who hate us, pepole who believe in different religions, homosexuals, pepole of all race, culture, creed, and different ideas of thought.
We don't judge or discriminate especially in our time where homosexuals are continously being shunned by the Christian majority. Anyone who deviates from Christianity should be dealt with between the individual and God, ont by our judgemental character.
Again, it is not our role to judge, our role is to love. We allow God to show humanity and compassion by his presence and his presence through us. If we stop judging others and focus on attaining true spiritual relationship with God, we can then truly shine Christ's light to all people.