The whole thing is so dumb. I mean, I don't actually object to raising the flags to full mast during his inauguration ceremony (or the whole day) and then lowering them back for the remainder of the 30-days of mourning thing (which seems like a long time to me anyway). I just can't believe Trump is such a small person -- well, I believe it, but can't fathom being that small and petty and needy, especially in his position. The guy just doesn't even seem to intellectually grasp the concepts of being magnanimous or empathetic or respectful, much less have any emotional intelligence to actually feel such things.
Heck, I would even understand if his team said look, lots of photos of the event will always have the flags at half mast for unrelated reasons and that is not great optics. Sure, I can't really disagree from a purely optics perspective (and I'm not personally wedded to all the pomp and circumstance around handling the flag anyway -- I mean I violate it a good bit wearing hats and clothing with the flag pattern, to be honest).
But this has been about Trump complaining that it is not fair to him ("ME!"). All id, all the time, I guess.