We are all created for the purpose of knowing God and knowing each other by that knowing God more, we are all created to love one another and help one another. Chosen is out all us created for this purpose, having a very special role in God's eyes and that he trusts 100% to fulfill this role. I'm not chosen in this sense.
In the sense, do I have a purpose, sure. In the sense do I have many tasks I am suppose to preform sure.
But this is not the context of the word chosen. And a nation or people can be chosen but only in the sense, they are to be helpers of the chosen guides among them. Otherwise, they aren't superior in any sense, rather, it's they if the message fails to be passed properly, who are to be blamed the most and it's they who the large amount of disbelievers is going to be found, not to people who get the message in a very distorted ugly form.
The Muslims been selected and particular the Shiites even more, but we have failed our duty, and have even become worthy of God's wrath more then any other people of the past and present.
We are not special, we are mortals who lucked out to be entrusted God's book and his last Prophet and his chosen pure family, but we failed them.
The Prophet last words were emphasizing on three things:
The book of God (Quran).
His Family.
And to treat women well.
We've done the worse possible in all three respects.
Peace and tranquility is upon those who God has chosen, but we were selected to help them, but we've failed them including myself.
We are not worthy of an iota of the gift of God's Message, Book, Messenger, and the holy guides.
We failed - and we probably will be replaced by another people as that is a real threat.
I just hope our failure doesn't result in destruction of most of humanity and doesn't lead most humans to disbelieve in Imam Mahdi and the Anointed King Jesus when they both return.
We failed - Wallah - we failed them.