I will plant a new heart and new spirit inside of you. I will take out your stubborn, stony heart and give you a willing, tender heart of flesh. Ezekiel 36:26 (VOICE)
Not sure where you get the idea that the words of God are only for a subset of people unless specifically stated to apply to the world. It is the opposite, his words are for all UNLESS he specifically says they apply to a subgroup. You might infer the most limiting interpretation is YHWH's words apply to 'God's chosen people' if they do not apply to all. Here, "you" is personal - to all individually.
Awesome. So God will turn the stubborn stony hearts of every man woman and child who has ever lived-- and ever will live-- on planet earth to a willing tender heart of flesh. That means that everyone on earth will be tender and willing, now and forever. And that means that everyone now and forever will attain salvation. Right?