Something disturbed me

Yesterday, one of my relatives caught a big turtoise. That's the biggest turtoise I had ever seen. I had a strong feeling that I should help it and set it free when he was discussing with others about how to deal with it. Somehow, despite all I'd said to him, he finally decided to sell it to a restaurant with a high price. (注意时态，中国人最容易犯的英语错误。)
I really(delete that word) think that everything in the world(on earth or under the heaven) are(? are or is? Consult a native speaker.) equal,(use either semicolum or a link device such as "and" here instead of seperating two sentences by a comma) human beings should not eat wildlives(What about animals raised for food?) optionally(what does optionally mean here?). But what else can I do?(you should say, but, I realy have no idea to help it.)