yayi: I personally am all for relocation to a good safe, and natural as possible environment for any endangered species.
And yes, as with any time this has happen, there have been nay Sayers. I just HOPE, there isn't some crazy person out there, so dead set against this, that they actually go out and kill these 2 tigers. It would be very upsetting but nothing surprises me in this world.
As far as them formally being from Africa *shrugs* the now a days Africa could be much different from what it was back from tiger descendants. Tigers have adapted to a wide variety of habitats, cold and snow, and there is now a family which hunts in a swamp marsh. These animals are still evolving even with out help from us, I think they are meant to stick around, but humans will be the ones to kill them off.
A good example of why there might be controversy over this, they had a bunch of bucks about the size of a Tommy or Thompson Gazelle they let them loose, and let the Tigers set up their own technique for bringing them down. From these 2 tigers, in no time flat they had chased down and killed 7 of these bucks! 7, in the wild even a pride of lions would be lucky to get one kill a day (granted it would be a bigger kill in most cases).
They even put them up against a herd of wildebeest and they took one down, this which was considered an ultimate test for them.
So you see, if they are such efficient killers in this land, it might eventually cause imbalance between these type of predators and the grazers. Lions, Leopards, Hyenas etc will now have more competition and perhaps loose out on their own food and head towards extinction themselves. Or even just as bad, driven closer to civilization where they would surely be killed.
As for my signature picture, I made it in Photoshop