I am all for charity (I give a fair amount myself). Any of us could fall on hard times. But I am against being forced to give money to these sorts of causes.
What if I, personally, feel like there is somebody else who is more worthy of my charity (those in the third world, those who were never given a first chance, those with genetic diseases, etc). It should be my choice who to help.
The problem I have with government welfare is that they tell me that if I don't contribute I will be thrown in jail (and if I refuse to go to jail, they will kill me). I don't like having that sort of threat hanging over my head - even if I was planning to do what they want anyways.
I have no intention of joining the KKK - but I would be just as angry if the government told me I couldn't do that.