The Verse:--"You (true Muslims) are the best of peoples ever raised up for mankind." means, the best of peoples for the people, as you bring them with chains on their necks till they embrace Islam.
هُرَيْرَة َ ؓ {كُنْتُمْ خَيْرَ أُمَّةٍ أُخْرِجَتْ لِلنَّاسِ} قَالَ خَيْرَ النَّاسِ لِلنَّاسِ تَأْتُونَ بِهِمْ فِي السَّلاَسِلِ فِي أَعْنَاقِهِمْ حَتَّى يَدْخُلُوا فِي الإِسْلاَمِ