Michael Koplow spells it out:
It’s one thing to blame Netanyahu for bad relations with a president who will be out of office in two years; one can argue that this is a problem that will resolve itself with no residual effects. But if you view Netanyahu’s machinations in a larger context, by constantly and openly favoring the Republican Party – either himself or through Ron Dermer’s actions in Washington – he is putting Israel itself at long term risk by helping make it a wedge issue in American politics.
I constantly argue that Israel’s primacy of place in the U.S. is due to popular opinion, but the caveat there is that this only works when it is bipartisan popular opinion. Netanyahu’s actions, where he sides with the Republicans in a very exaggerated manner, are having a serious effect and eroding traditional cross-spectrum popular support for Israel, and once that passes a point of no return, Israel is going to have serious problems. I don’t place the blame for wavering support in the Democratic Party for Israel solely at Netanyahu’s feet by any means, but he is a big part of the problem and has stoked the fires at many points. The GOP has an obvious political interest in making Israel a full-fledged wedge issue and using it as a cudgel to hammer the Democrats as often as it can. The burning question for me is why Netanyahu is so willing to allow himself to be used in furthering this outcome when it is so obviously not in Israel’s interests.