Julian Assange has some "big balls." Either he really likes pushing his luck, or his end game is way bigger than anyone realizes. He was just starting to curry the favor of the general public. He was the subject of a prominent biopic, he received a positive resolution from the UN. He has a lot of supporters, but they're not all fully sold on his philosophy. Many of his supporters might consider this leak not in the s…
No, it's far better to keep an eye peeled on everything they do now that they've been shown to be trying to slip their mandate.
> Therefore one has to wonder what Assange's motivation is behind this leak [...]
No, not really. His motives are really clear. Force the liars out into the light of day. The US Army was actively collaborating to frame innocent Iraqis with terrorism charges - something which directly contributed to ISIS, and they hid evidence and lied to the press and US investigators about it.
Honestly, your motives are more in question. Assange pointed out that our government was lying to us and you heap blame on him.