"From Harper to Trudeau, has Ottawa’s culture swung too far from one extreme to another?"

Simple/short answer......yes

For every action there is a reaction. For nine years we lived with/under a (far) right-wing government loaded up with reactionary demagogues, oil pushing, environment detrimental, climate change denying, science/education hating, union busting and lunatic fringe foreign government supporting Harper government

Thus/so, now/for the next 8 to 12 years we as a nation will have a left of center, tree hugging, environment supporting, women's rights promoting, "the world loves Canada" government 

And not a moment too soon..............
.