So, then, your own statement that you're "not condoning nor advocating that God gives humanity Carte Blanche to commit whatever heinous evil they so desire" was wrong? God giving humanity "Carte Blanche to commit whatever heinous evil" we want is giving us the right to choose. It's clear you don't believe that we have the right to choose whatever we want, and we agree that humans have the capacity/ability to choose sin; so, I really don't know what it is you're disputing.
You're doing what most people who recoil against Calvinism do: argue against it by arguing against hypercalvinism. The scripture says that God predestined those whom He would save (and that He then called, justified, sanctified, and glorified them); it doesn't say He predestined everyone else to not be saved (though they certainly aren't going to be saved). And even if you argue that He predestines both, so what? If God didn't choose to save some, no one would be saved because we can't save ourselves. But, I'm not going to discuss this with you any further in this thread because it is taking us off the topic of the thread. Let's just stick to the topic of the thread here.
Well, no, that can't be right. The passage says that the gift is not of ourselves; it wouldn't make sense for Paul to say that grace is not of ourselves since grace is unmerited favor. No, the phrase "and that not of yourselves, but is the gift of God" refers to the word that comes directly before it (faith). But, again, this is not relevant to the thread.
Calvinists refer to the grace that is offered to all as "common grace," and distinguishes it from "saving grace."
And unless God specifically chose to save particular individuals, no one would be saved because humans are born spiritually dead and absolutely cannot will themselves back to life. Jesus said in Matthew 19 about salvation that "With man this is impossible." Paul said that our salvation (by grace through faith) is not of ourselves but is the gift of God. In other words, there is nothing we can ever do to cause our own salvation. Again, dead people can't will themselves back to life. To say that humans somehow have the capacity, on their own, to will themselves saved is saying that dead people can will themselves back to life and, therefore, that Paul lied when he said that we were dead in trespasses and sins.
Even the faith to believe is the gift of God that comes through hearing the word of God.
Again, all this other stuff is getting us off the topic of this thread. Bringing us back on topic, I'll say what I said earlier, that there isn't so much as a single passage of scripture that says there is or isn't "free will," but that the views one way or the other are merely interpretations of various scriptures pulled together. What you and others describe as "free will" is merely the definition of "will" (the capacity/ability to choose).