That humans killed off the Thylacine
I don't understand why this even needed to be a study.
Because as stated many did not / do not believe that humans alone did this. Many current species are under significant threat and still many believe it's natural selection and / or disease leading to their demise and not the spread of the human race and it's associated behaviours (pouching, deforestation, urban sprawl, etc).
In a hundred years time I swear there will nothing left outside of zoos except cockroaches and genetically modified sheep - probably bred smaller for easier live exporting.