No it is not a term for nullifying what Scripture says. It is a method people use for taking Scripture out of context to make it say something it does not.
John 3:16 says nothing about humankind. It says world. John 3:16 is not speaking of all individuals. That is not a question that verse is answering.
1. Nowhere does the Scripture say God desires all persons to be saved. If that was truly His will, it would be so. In fact, Scripture says pretty plainly that there are some that are not desired to be saved and rather are vessels of destruction.
2. Nowhere does Scripture say Christ died for those who are not chosen. And there is no "to be" chosen. You either are or you are not, it is as plain as that.
3. Common ground but I think we also mean slightly different things by that statement.
A Greek word can be translated as "world" or the same word can be translated more literally, humankind.
Did anyone say humankind refers to specific individuals? Nope so obfuscation on display.
Scripture (John 3:16) says God desires all people to be saved according to His redemption plan.
Every individual conceived in sin starts out as a vessel of destruction, children of wrath.(Ephesians 2:3)
Christ died as a ransom for all. (1 Timothy 2:6)
No individual was chosen before creation, 1 Peter 2:9-10 precludes that assertion.
Folks, all they do is repeat their mantra, full of generalized claims of what scripture does not say.