I wouldn't invite Irving to speak, or bother going to hear him speak, personally. Some people might feel inclined to go along if only to keep tabs on what he's saying and so dispute him.
I did indeed notice what you wrote about "f I had my druthers..." and I wholeheartedly admire your sentiment in the matter.
Regarding Turkey - the issue so seems to be idealism v. practicality. I know politicians have to make compromises in order to keep the boat afloat. But what price are people willing to pay in order to do this? I think it's foolish to allow Turkey to get away so easily with denying its own dark past. A spade is a spade so to speak, and if a country is allowed to call it something else, or pretend it didn't happen, for political expediency, it's only a matter of time before this policy comes home to haunt those who subscribe to it. It also leaves Israel - through the actions of its government - or zionists generally, open to charges of duplicity / double standards, which can hardly help their cause.
While the politicians have their needs, we lose sight of overarching ideals at our own peril as a species.