See, you think it's personal and that I've made some kind of determination on your character based on my conclusion. You've totally come off the rails and started attacking me personally at the mere suspicion (not even to you!) that you might have misinterpreted things. I've merely read and worked with the information that was made available; you call this person a friend, for example. You were having lunch with this person. This person felt comfortable enough with you to remark upon your condiment choice. I've observed many, many people remark upon the same choice in a jesting fashion.
Now, which is more likely from my perspective: that a misinterpretation by you is at work (and which is spilling over here, since you clearly don't have closure on this egregious scenario), or that your friend is the one person out of millions who actually cares about ketchup on a hot dog and was ready to fight with you about it? Someone you identify as a friend chose ketchup on a hot dog as his Maginot Line in your relationship and demeaned you over it. Okay, maybe that did happen (in which case you should think long and hard about who you identify as friends), but my point was it's extraordinarily unlikely, and you cannot fault me for concluding that in my own time and with the facts given.
You can't relay a story and then expect everyone to blindly accept your interpretation without reading objectively. That's unfair. I think you very likely misinterpreted things, yes, and I base that on the entire story including believing your perspective entirely. I don't think you're lying at all. That's the entire point, that I think you're telling the truth from your perspective, and your perspective might be a little bit off. It's nothing negative. I don't think less of you. I see misunderstanding like this all the time.
Yet you felt passionately enough about it to go after me personally and call me part of the problem, simply because I didn't subscribe immediately to a half story. I feel I'm exercising the better option: I'm reading objectively and drawing my own conclusions rather than immediately buying into a single-sided narrative. That's what we should do when confronted with unfamiliar situations relayed by people we don't know, because it's the fundamental brick in the foundation of avoiding mobs, rash conclusions, beheading people over blogs, and so on.
And see? Now we're arguing about this. About ketchup on a god damned hot dog. Remember how I didn't want to live in this world?
(Edit: Also, please, please, please tell me you didn't compare your choice of condiment to the plight of minorities in an upthread comment. I will conclude something about your character after reading something like that, if you mean it.)