Do you believe the world was made in 6 days by an invisible being? Do you believe that people should be legally be allowed to own automatic rifles and ammunition? Do you believe that a woman should be allowed to decide whether or not to continue with a pregnancy? Do you believe that people should be allowed to eat meat?
People don't all believe the "right" thing. You are on a very slippy ground when you start referring to "objective reality". A lot of the "reasonable" views I imagine you hold, would get you into serious trouble in a lot of countries in the world
Objective reality is not a slippery slope - let's look at your above examples.
1 - creationism - there is currently no evidence to suggest it is true, however you are welcome to your religious beliefs, so feel free to crack on with your own religious practises so long as they don't affect anyone negatively.
2 - This is an opinion, so you are entitled to your view.
3 - This is an opinion, so you are entitled to your view.
4 - This is an opinion, so you are entitled to your view.
Objective truth isn't believing the "right" thing.
Objective truth is accepting the facts as the facts - it's what society is basically based on.
The objective truth has been dissolved by the right since fox started basically, and has come to it's pinnacle with the terrorists in the capitol last week.
The simple objective fact in the US is that the election wasn't stolen.
There was no significant fraud was found (ie that could be deemed to be significant or potentially affecting to the results), despite numerous court cases being raised.
If there had been fraud, simply put, they would've found it by now.