No it is because of their powerful influence in image making, opinion forming, and news fields, and in leadership and forming of radical left wing groups, and their concentration in influential geographical areas like New York city. Homosexuals share much of that same over sized influence, far beyond their numbers.
That 2% figure is meaningless, Muslims vote like Jews, but their influence will never be equal.
So you contend that the question is not about how the majority of Jews vote, it is rather about why Jewish intellectuals are not persuaded by Christian conservatism?