Same as with the Syria bombing: the only real purpose is to boost Trump's public image and distract from whatever's going on domestically.

I have seen it speculated (and it may be confirmable by now) that the real message of this latest bomb was intended for North Korea; Afghanistan just gets to suffer for it. In which case it certainly isn't working as a deterrent, but as an accelerant it may well be doing the trick.

I fear he will continue semi-random bombings until they start making his own life worse instead of better.

I just worry about how much worse everyone else's lives will need to get in order to reach that point.