Because he flip-flops and doesn't support gay marriage. Meanwhile, every Democratic candidate has flip-flopped far worse than Rand Paul and only talk about gay marriage when it benefits them
Lol, is this post about support from liberals or from the general public? Because you can't honestly think the only issue we have with him is his opposition to gay marriage.
I can only speak from my personal experience, but liberals I know only have gripes with his perceived flip-flopping and his position on gay marriage. Yes we differ on economics, but there is no reason to not like him just as a person. Kucinich is a hardcore statist, but libertarians adore him.
Since when are we talking about him as a person? He's one of my favorite Republicans, but obviously I have qualms with him in areas other than gay marriage (minimum wage, taxes, abortion, guns, etc.). Whoever you're talking to is hardly a liberal if their sole disagreement with him is his flip-flopping and opposition to gay marriage.