Read and reflect on verse 687 from Surah Al-Maaida: And [both] the Jews and the Christians say, "We are God's children, and His beloved ones." Say: "Why, then, does He cause you to suffer for your sins?...
وَقَالَتِ الْيَهُودُ وَالنَّصَارَىٰ نَحْنُ أَبْنَاءُ اللَّهِ وَأَحِبَّاؤُهُ ۚ قُلْ فَلِمَ يُعَذِّبُكُمْ بِذُنُوبِكُمْ ۖ بَلْ أَنْتُمْ بَشَرٌ مِمَّنْ خَلَقَ ۚ يَغْفِرُ لِمَنْ يَشَاءُ وَيُعَذِّبُ مَنْ يَشَاءُ ۚ وَلِلَّهِ مُلْكُ السَّمَاوَاتِ وَالْأَرْضِ وَمَا بَيْنَهُمَا ۖ وَإِلَيْهِ الْمَصِيرُ
And [both] the Jews and the Christians say, "We are God's children, and His beloved ones." Say: "Why, then, does He cause you to suffer for your sins? Nay, you are but human beings of His creating. He forgives whom He wills, and He causes to suffer whom He wills: for God's is the dominion over the heavens and the earth and all that is between them, and with Him is all journeys' end."