So while you joke do have the reason why it happened now?
I have no idea.
On the face of it, doing it to distract from impeachment doesn't make sense.
My gut feeling is that there wasn't any one big reason for it being now, it just worked out this way.
It's probably something that's been on the table for a while, the embassy attack may have been the straw that broke the camel's back.
There's also the opportunity factor; how often is he in Iraq and they know exactly where he is?
And as for whatever he's been planning going forward, I'm not convinced it's anything significantly worse than what he's been doing until now. (i.e. it explains why he's a legit target but doesn't answer why now specifically)
So why are there "conflicting reports from the WH and DOD?" (I'm gonna take your word for it that this is the case, I really haven't paid much attention to what anyone was saying.)
1. Messaging has never been this administration's strong point.
2. they're trying a little too hard to blow up the importance of doing it right now, even if the reason is as I said above, primarily to avoid accusations of it being to distract from impeachment.
3.for Trump there's no such thing as "now is when it just happened to all come together' it has to be "This is the best, most appropriate, time there ever was and ever will be for this"