First of all, I like your topic and title. It is more catchy than just, "Save the Tigers!" You captured the reader's attention with "Just 1411 Left". This is very important in a persuasive piece, attention.
Second, I think you did a great job emphasizing your points. I don't think you needed the Facebook part, though. You could just mention, a friend said. I think the Facebook part kind of lead off from the main idea.
Third, this part:
If you’re still ignorant to this important issue, then you seriously need to come to your senses.
In a persuasive piece, if you really want to persuade the reader to agree with you, you don't insult them. It makes them be annoyed instead of carefully thinking about your resons. It somehow gives off a feeling of bad impression.
Fourth, another mistake:
Everyone is perfectly aware as to why they are killed.
If everyone was aware, then what is the point of this article? It contradicts with your main point because the purpose of this is to tell people to stop what they are doing. You are supposed to think that NOT everyone is aware because believe me, a lot of people don't see what they are doing wrong. You go on to tell them about what they're doing to kill the tigers after you just told them they already knew. Huh?
Just look over the piece and ask yourself, does my sentences really make sense? It was pretty interesting to read!