The single most important reason for my downvote was the invocation of "common sense", which I tend to read as "don't bother doing any analysis, just fall back on your learned heuristics"; I'm fairly sure this is a correct reading in context. Now, that's good advice in time-constrained or highly complex situations, but this is neither. To make matters worse, it's a politically polarized topic, which implies that the salient heuristics are very likely going to be split along ideological lines: half the people you're talking to are using their common sense, which just happens to say something different from yours. That in turn implies either that you aren't aware of this dynamic or that you're using rallying tactics, and I don't want to see either one on this site.

I also feel it's too long for its content. Additionally, it's in a political thread, arguing for a politicized stance, and both lower my threshold for downvoting.

8) It's too long, says very little and doesn't have a summary preceding it. 9) Almost all of your writing is either political or meta, which suggests you don't belong here and will only add noise. 10) You've clearly failed to learn from previous criticism.

I've no idea who you are and I've just downvoted you because your post is a tedious wall-of-text.

5) It sounds vaguely leftish

LWers are mostly socialists. If you're getting downvoted here while saying "leftish" things, what you're saying probably has some actual problems.