The pendulum of history keeps swinging. When the clock is off balance, the pendulum swings too far in first one direction and then in the other..

I think that the people who oppose President Obama must feel even more strongly than the events of these eight years had shown. They perceive the pendulum as having swung too far and they are correcting it.

And it could scarcely be more opposed:

Where Obama is cerebral and intellectual, Trump lives in the moment and is incurious about the rest.
Obama has class, Trump is crass.
Obama is diplomatic, Trump is reactive.
Obama is faithful, Trump promiscuous.
Obama has two children by one wife; Trump has five children from three wives.
Obama values women, Trump thinks they are on earth for men's titilation.

There are many more conclusions that could be drawn