Are you serious?
It's literally THE most common murder: a loved one.
I mean, I'd agree it's messed up to murder your own family members. But THAT is the messed up part; the reasoning behind it is inconsequential to me.
I'd argue that the reasons are especially important if there's a pattern at play as opposed to random acts of lunacy.
I suspect that if this was discussing some of the pitfalls of any text/ideology of any other religion apart from Islam (which some people want to extra-insulate from the same criticisms they'd provide to any of the others), people would have no problem linking the doctrine to the behavior, and attacking the doctrine for it.
If this were a conversation about say, gay-to-straight conversion therapy and the psychological damage is causes, and it was pointed out that in the context of the US, 90% of that stuff goes on specifically within the realm of the southern evangelical denominations.
Would your stance be "the reasoning behind it is inconsequential, the fact that it's happening is the messed up part" (in a way that doesn't point fingers at any group/ideology specifically, or connect certain dots)?
With regards to people handling certain things with kid gloves, I've always thought a good exercise is to do a honest litmus test with one's self.
Take any criticism that people make against Islam (that a more progressive person may object to)
For example:
"In
Islamic areas of the
Middle East,
Muslims execute gay people, and 30% surveyed think death is the appropriate response for leaving the
Islamic faith"
And pretend the same stuff was hypothetically going on from a group that they don't have any reservations about criticizing, and do a simple word replacement, and see if they'd still object to the criticism in the same way:
"In
conservative areas of the
rural Arkansas,
Southern Baptists execute gay people, and 30% surveyed think death is the appropriate response for leaving the
Christian faith"
We know the answer to that question right???
The answer obviously is if that stuff was hypothetically going on in Arkansas, nobody on the left would have any reservations about both identifying the ideology as a major cause, and criticizing the ideology (and whatever political movement that was aligned with that ideology) for being complicit in the problem.
I think Sam Harris summed it up nicely on Real-Time when he made Batman cry (Ben Affleck)