You can search this forum from stem to stern and you will not find an instance of me defending the Bible. I'm not fan of it either. But your argument appears to be of the "two wrongs make a right" flavor?
As for totally "in" context. The Quran declares itself to be timeless and easy to understand. When people try to defend the Quran with all this context nonsense it's like they haven't read it themselves. It declares itself to be perfect AND easy to understand.
And remember, ISIS can and has made very good arguments that they are only attacking people who have been attacking followers of Muhammad.
How about this, can you find an action taken by ISIS that cannot be defended in the Quran?
I'm trying to share a civil conversation with you and if you do not wish that, please tell me. I am American, and a Veteran, and was once a very active Muslim. I am writing this as I listen to "Let Mr Blue Sky In" on Youtube. So, I can not be holding an RPG and waiting to attack someone.
In my private conversation with other Muslims, it seems to be a consensus that ISIS members do not pray and do not read the Quran. Some Muslims insist that these folk are not Muslims. There is a huge and well documented commentary of their atrocities throughout Iraq, and Syria. Other Muslims say they are Daish (Dogs I am told).
As to the Qur'an, some recognized facts perhaps? The Qur'an was originally written in Classical Arabic, a dialect that is no longer spoken, and generally not written. There are "Interpretations" of it around and I think the best of these is the Yusuf Ali Interpretation. Yusuf Ali was born in Pakistan or India, but I think grew up in the UK.
Yes there are passages in the Qur'an that advocate killing and violence against those who were first attacking the followers of Muhammad PBUH. Now, if you turn to the Bible, in the Old Testament, in the commentary after the death of Moses, when Joshua was leading, he was instructed to go through some villages, and wipe them out, to include men, women, children and animals. Not questioning the will of God at all, but if we are going to accuse Muslims, then let's hold everyone accountable.
These days, I'm less and less Religious (owing to the tender mercies of believers) and more interested in History.