I would be more concerned about whatever impact it would have on a modern Eco system, particularly with regard to disease, viruses and bacteria rather than whether its angry or not!
I doubt much, considering it is only 10,000 years old and is believed to have become extinct due to human influences.
Stick a few dozen around Siberia and I'm sure they will thrive, they may even improve the ecosystem bu reintroducing large mammals into the area.