I'm not going to pretend to hate sugar because I don't and because I'm biased. I think it's more important to hate the context rather than the sugar.
Sugar causes problems when you let it invade the overall quality of your diet in my opinion. Most people who switch to a Paleo type diet did so because they were unhealthy. For those individuals it is probably wise to minimize pure white sugar. I think this is especially true if your daily caloric intake is low. So if you are eating 1500-2000 calories a day it's probably wise to eat only the nutrient dense foods. If all your eating is 1500-2000 calories a day lets say you eat 500 calories from white sugar. Basically 25% of your diet is coming from white sugar with absolutely no minerals or vitamins. With a caloric intake that low you are just begging for problems. In that case the white sugar is the problem because in context your not getting enough whole foods again with the vitamins and minerals for your body to operate properly. So I think, or at least I say that in this particular context sugar is the indirect cause but your nutrient status is the direct cause. Big difference. And blaming sugar is a cop out, take responsibility and blame yourself. If you have a sugar addiction more than likely you're not getting enough of some nutrient.
Now lets take somebody who is extremely active. Lets say to maintain their basic metabolic caloric intake they are eating a good nutrient dense diet. However they also need an additional 2000-3000 calories a day because they participate in a sport. It would be easy to say okay, I'm eating 2000 calories to maintain my BMR from nutrient dense foods so I should be able to eat white sugar for the rest of my diet because I just need something to burn. Not so fast. You also have to take into consideration that your going to need to replace any minerals and vitamins that you lost during your activities in addition to the fuel. So as you can see even if you are working out a lot your still losing more than just energy your also loosing minerals and vitamins.
Okay so here is how I approach things. I run 100+ miles a week. I eat eggs, butter, a little meat and liver, milk, cream, and cheese, and bone broths, potatoes, etc. A really Paleo type diet that nobody on here could disagree with. However, I also drink a lot of home squeezed pulp free orange juice and whole ripe fruits. When I consume white sugar, it's always mixed in coffee with milk or cream, chocolate milk, hot chocolate made with egg yolks, ice cream, milk and honey, etc. It's always mixed with something nutrient dense. It's never just empty sugar calories.
Even when I have things like white rice, it's never just white rice, I'll make a cream sauce.
Again, when people have problems it's not the sugar, it's: what is white sugar invading? If it is invading the quality of your diet, then you have what's coming. If your addicted to sugar it's usually because something else is wrong. A good portion of the foods I eat have lots of sugar. I do not have a sweet tooth nor do I crave sugar or sweets. It's just part of my diet just like everything else I eat.
These anti-sugar "experts", my problem with them is that they can't see the forest from the trees. They are ignoring the larger problem of diet quality. Especially the outspoken ones. I would guess that they have some deep seeded psychological issues and nutrient imbalances judging from their demeanor and critical reasoning skills.
If you want to hate sugar because it helps you eat a better diet. Good. Just realize the solution to the problem is to eat a nutrient dense diet i.e. take care of yourself.
Food for thought: Perhaps sugar science only shows trends towards disease because it is placed in the context of a overall world wide decline in diet quality.
Update March 9, 2012: I'm convinced beyond a shadow of a doubt that white sugar is quite beneficial, it's no secret that I pound oranges, but behind the scenes for a very a long time I've been riding the dark horse, she has led me down the straight and narrow.