Hehe. A far smaller percentage of Australians came from criminals then is typically believed, but we like to keep the image going. 🙂 And as to being rude to waiters - I don't think that's hate. Just because a customer is a rude/ self centred/egotistical/elitist/classist/etc doesn't mean they hate them, rather it just means they might be rude/ self centred/egotistical/elitist/classist/etcNow, as to the question. Hate, really, is a serious thing (looking in broad terms at all hate, the hard stuff, pet hates and all that), a personal thing, a dominating thing. One of the higher echelon negative emotions, and in that sense I don't think it is nearly as common as other emotional/mental states that are considered negative - like anger, envy, fear, etc. Some people hate easily, yes, but I don't think the majority do - at least in any significant way. I think plenty of people can go through life without really ever hating anything, simply because they have never been put in a situation where they have to deal with something that would cause hate to form.
That said, most everyone, bar the stoniest of minds, has the potential to "love"(once again love in the most broad of terms, not the hard to find, high minded, idealistic sort presented by the romantic poets of old) - and usually will in life. They will have kids, wives, pets. They might love a hobby, or the mountains. They can see beauty, feel attraction and all that. The problem of course is that love is a very, very personal thing, acting on an individual scale - while hate is often magnified to huge levels. When someone acts on hate in a significant manor, well, it makes the front pages. When a man gives a bunch of flowers to his wife with a card saying "love you", well, who hears about that? Who cares? Those two people, and very few others.
In this way hate might have a more profound effect on the world, or at least a more visible, obvious effect, but it's not the most common emotion, nor the most frequent. If the question was "Which does the world have more of - love or negative emotions" - I'd quite possibly give it to negative emotions hands down. However in terms of love and hate, the world has more of the former, but the latter is often much more obvious. And I agree mostly about hate often being derived from love - after all, those people who hate often justify it to themselves. Someone mentioned the middle east - hate born from the twisted love of God or whatever. Righteous hate. Justified hate. Noble hate - still hate, but often a reaction caused by the effect of the world on what they love. However a lot of hate can be foolish, ignorant and the like (bigotry, racism, religious extremism, jingoism) - but rarely will the hater see it as anything other justified. Often when portrayed hate is the response to something that is the complete antithesis to someone - a danger to, or completely different from, everything they care about.