There is a bit of a straw man here. The writer seems to be making the point that the majority of Christians cannot make the distinction between the sin and the sinner. There are a few actual “haters” out there, of course, but not the majority.
Speaking of sin, as we take on the character of God in our Christian walk, we should be learning to love what God loves and hate what God hates. In other words, sin should be abhorrent to us. We should be disgusted by it. Remember the story of Phinehas and his spear? Look it up...Numbers 25.
I don’t believe most Christians “hate” homosexuals, but are “Hostile” towards them. There is a difference.
Mostly because the sight of homosexuals kissing/whatever is repulsive to us. That in turn makes us hostile. Hate is too strong a word to use.