Marty, I understand what you're saying, but I think there's still a difference you're not recognizing between those dang liberals understanding the reason for something and excusing it.
How about this example. I have a four year old son. I love him to death, but he can be an obnoxious spaz sometimes. Often that behavior lines up with him being very hungry or very tired. Now if he does something naughty while he's tired and hungry, me recognizing that the misbehavior has more to do with his hunger and tiredness doesn't excuse the behavior itself, but knowing the reason behind it helps me to remedy it in the future. "Hey, he's kind of a d*** if I run errands all morning and don't stop for a snack. Next time I'll stop for a snack."
"Hey, Muslims kind of don't like it when we depict their primary religious figure in compromising positions (or at all for that matter). This doesn't excuse any of their misbehavior, but maybe we should also look at not antagonizing them next time."
That sort of thing. Not a perfect analogy, granted, but I'm short on time and I think it gets the point across.
Recognizing cause does not excuse behavior.