The above arguments are all examples of informal logical fallacies - slippery slope, no true scotsman and appeal to nature, respectively.

The Slippery Slope Argument is an argument that concludes that if an action is taken, other negative consequences will follow. For example, “If event X were to occur, then event Y would ...

Now, I turn to more details on one specific kind of slippery slope mechanism—cost-lowering slippery slopes.] [1.] An Example.

And slippery slope risks might also be hidden—especially from average voters—by information asymmetry. Voters might not know exactly which step B would be proposed after step A is adopted.

If you participate at all in online discussions, particularly on social media, you’ve likely seen someone discuss the idea of the “slippery slope” fallacy.

Johnson is aptly demonstrating what is known in rhetoric class as the fallacy of the slippery slope (aka the Fallacy of the Beard, the Camel's Nose, the Boiling Frog, etc., etc.).