Please take note: Merkel has behaved extremely apathetic considering that she is in the middle of a reelection campaign. This has multiple reasons, one of which is that her ideological compass indicates that "staunch support" for whatever the US does is always the right answer. For example, she always supported the Iraq invasion. Fortunately she wasn't the chancellor then.

What we see here is the absolute minimum she thinks she can get away with. However, since the criticism over here of her inactivity (and complicity) is only getting started, the situation might push her to go further than that.