When did it come to the point that being a Christian meant only caring about two issues,­ abortion and homosexuality?

A wonderful article on CNN discusses the importance of Christians actually being like Christ. Roland Martin points out that many non-religious people in the world see Christians as only caring about two issues: homosexuality and abortion. Are those two issues what Christians really should be representing? Rather, should we not represent the love of God and compassion towards the poor, homeless, and the sick? As HIV/AIDS becomes more and more prevalent and kills even more people, Christians should point their focus towards helping end this epidemic.