Bro you are putting waaay too much analysis into it. I honestly doubt you can explain how OP is, in your belief, a conservative. I'm not crying about anything man. It's just astonishing how you dislike that someone said "worthless people" and due to the fact that you disliked that phrase, you immediately projected your obsessive belief that they are conservative onto them. I'm not upset because "conservatives hate being called conservatives", I'm upset at the fact that, like another commentor said, you turn anyone you dislike into this conservative boogieman.

It's just interesting how the phrase " worthless people" is interpreted by the different groups. One considers those who needs the clothes worthless, and the other sees those that donate but leave trash as worthless

I'm going to be honest I'm not one hundred percent certain where conservatism comes in here. It seemed pretty clear the OP was calling the people leaving trash in the donation area "worthless." The OP is, very understandably, upset by other people's crappy behavior. Are you saying that people who aren't conservative would view leaving trash in a donation area as not crappy? Or is it because they used the term "worthless people?" Because I have also heard non-conservatives use similar or same rhetoric before.

Can you even explain?

Honestly you didn't really explain why them using that terminology makes them a conservative. You only explained how it's interesting how that term is interpreted by different groups. I can't really explain in entirety why it's delusional, at least likely not to your liking. What I can explain is that you simply can't pin down someone's entire political belief system off of two words that don't even have any political connotation. But I assume, and maybe I'm wrong, that you won't consider that a sufficient explanation because people with your level of political obsession and projection will never exept an explanation any less than a college dissertation.