Where did Chiang Wan-an's drug statement go wrong?

First off, I don't have a vote and I'm just following the trend, but I didn't even follow it closely. I wanted to jump on the bandwagon of the tens of thousands of comments on Chiang Wan-an's Facebook page too, I've read thousands of comments, and most of them are copy-pastes or just 'came here' posts. I understand about 60-70% of the Blue camp's stance, But I don't understand the Green camp's stance at all, can someone make a TL;DR for me?