There is pretty good evidence that late in life, that Calvin himself recanted "limited atonement" and advocated "unlimited atonement."
To be sure, your statement below that God offers salvation to everyone is NOT a "limited atonement." One either believes a limited atonement or one doesn't.
If the offer goes to EVERYONE, how is that limited? Sounds "unlimited" to me. That's the realization that Calvin arrived at.
1. There is no limitation on the free offer of the Gospel. All who believe will be saved.
2. There is a limitation of the efficacious impact of the atonement. Only those who believe will be saved.
3. What realization did Calvin arrive at? Do you have documentation of this, or is this something that someone posted on a website, but you haven't taken the time to verify? (Or, more probably, it is a misunderstanding from one who doesn't know the distinction between the Gospel offer and the atonement any better than you seem to demonstrate.)
Of couse you will lead us to your resource right?
X,The blood of Christ is sufficent for all, but effective only for some.
The call goes forth
Matthew 22:14 For many are called, but few [are] chosen.