The situation is this:
Ryan’s in a leadership position as Speaker. Part of being a leader is putting your own self-interest aside to carry out what’s expected of you. Which in Ryan’s case was to press for immediate unity—not sow immediate confusion and doubt with the weird mealy-mouthed hesitating excuses he made about “not being there yet.”
It was selfish and unbecoming of his position.
Ryan is point man for the GOP. If you accept the argument made by Hamilton Jay in post 72 (I do), somebody has to be the face of the GOP.
I'm not buying the claim that the party is unifying. It isn't clear just yet that the GOP accepts Trump as the nominee, and in fact, what is clear is the opposite. The party does not accept Trump as the presumptive nominee. My takeaway is that the party is no closer to be unified today than it was yesterday. All we have is a bunch of meaningless claims from the politicians.
My point is that while Ryan's actions may be unbecoming in a general sense, or in a usual election contest, this is far from usual. This really is Trump and his voters siding with a minority of GOP who have been opposed to the party's direction for years. You bet that Ryan and his ilk are going to fight like hell.
Another perspective would be to realize that the majority of the Republican electorate, who didn’t vote for Trump in the primaries, needs a cartharsis and that Ryan’s actions begin that process.