They take that position because they have neither the faith nor the understanding of how faith works. Abraham did not obey God blindly. Instead, he obeyed because he could see.
٣ ،‏ ٤ ‏ (‏ أ )‏ صِفْ أَعْظَمَ ٱمْتِحَانٍ لِلْإِيمَانِ وَاجَهَهُ إِبْرَاهِيمُ .‏