The rational reason for a nuclear advocate to oppose wind is economic - nuclear and wind servicing the same grid do not play well with one another at all - they both draw on long-time-horizon capital, and in a zero carbon grid,  the intermittent supply of wind electricity unrelated to demand is going to lead to supply spikes that have to be wasted and under a feed-in-tarrif-for-wind regime, which is the current rules, said wastage will be borne entirely by the nuclear operator - and turning off a nuke plant on a windy night does not save a nuclear operator a single euro-cent, so it is all cost. There are potential solutions to this - Using such spikes to synthesize liquid fuels is, in particular, an idea I am fond of, but currently, if you build enough nukes to get a carbon-free grid (which is what nuclear advocates want!) adding windmills to said grid just adds cost with no real upside.

The emotional reason nuclear advocates come across as opposed to wind is much, much simpler, and far more potent; It is this: The expansion of the nuclear electricity industry got halted in its tracks 40 years ago by activists that promised us a future of wind and solar power. "A grid powered by nature by the year 2000" was their ideal, their slogan, and their promise to the world. Honestly. If I give you a time machine, and statistics of what power production look like today, and send you back to the founding of greenpeace, do you think you could convince them that solar is still effectively non-existant in 2010? that we are still burning coal?

Those guys had a vision, and they were wrong

It is now 2010, and the side that argued that we should replace king coal with the atom, and sooner, rather than later, are feeling really rather massively pissed off that people are still advancing that same vison as an alternative to the technology that we know, without a doubt, can get the job done. The gut reaction, the vision I get when I hear people advocating an all renewable future ? I do not think "That would be nice" I think "If these guys keep winning, 2060 will roll around, and the grid will still be 50% coal".