As much as a fan I am of tigers, you do realise that a tiger has an incredible amount of kills over its lifetime? Tigers have to eat a lot; it is an active, large, warm-blooded predator; they need insane amounts of energy. I agree their habitats should be protected, but the average tiger is bound to kill more wildlife than the average poacher. Other animals also suffer from the cutting of woods and poaching, so giving tigers too much chance to re-stablise is gonna mess up the whole eco-system.
Tigers are some of my favourite animals, don't get me wrong, but ecosystems adapt to many little changes and it is very risky to just change it. So whatever is going to be done needs to be done very carefully.