Perhaps if the only choice is betweem Hillary and Javits, there are conceivable senarios in which it would make sense to support Javits (if only to hurt Hillary's chances), but there is no reason any conservative would support him in the primary (which, in 1980, they didn't). In his last term, his ACU average was 3.2/100 (worse than Moynihan, who averaged 8.5 in the four years he was in office during that period), while Moynihan's predecessor Buckley (elected on the Conservative Party ticket, incidentally) scored in the 80s.
It's unlikely that Pirro is this liberal, but my point is that there is a point at which a Republican can be so liberal it is futile for conservatives to support him.
Very true. You are speaking to a New Englander - we have plenty. However, in terms of maintaining control of the Senate, even idiots can be useful and it's easier to pressure a RINO than a Democrat.