Well he was much more than that...
On the GST some people presented it as a new tax but it replaces an hidden one, the manufacturer's tax.
He led the party to a
landslide victory in the
1984 federal election, winning the second-largest percentage of seats in Canadian history (at 74.8 percent) and receiving over 50 percent of the popular vote. Mulroney later won a second
majority government in
1988. So he was not so hated...
He was first of all a business man but he also cares for the workers.
He introduced Free Trade agreement with the USA. He was also well recognized by the international community.
For globalism, he joined the parade, I doubt he started it, all developed countries went in.
He was a Progressive Conservator. I think even Western Canada would win with this kind of politic. But since the Reform Party screwed it all, the conservative party means nothing for a lot of Canadians.
I pretty well agreed with what is written here:
https://en.wikipedia.org/wiki/Brian_Mulroney