You are very confused as to what's happening, and buying into the Creationist story far too much. There is no crusade for evolution. Most of us would be perfectly happy to study the theory in peace and never bother other people with it. However, we can't. It's really as simple as that--if we want to be free to follow the evidence where it leads, we MUST speak out. What you are seeing is not a crusade, but a rigorous defense. And it is ALWAYS wrong to tell people to stop defending themselves when they are attacked without provocation.
Does it really matter what Joe the Accountant might be *gasp* wrong about a scientific theory?
You've obviously never had to discuss why you're not going to burn in Hell for all eternity for believing in that ebil Darwinism. Some of us have. Repeatedly.
(And I suppose I'm just supposed to ignore that the practice of vaccination is considerably older than the theory of evolution. And for that matter that animal husbandry have been going on for about 10000 years now, without needing to believe that humans evolved. And I honestly don't want to ask about how understanding the origin of man will help us to deal with climate patterns)
These this are older than evolution, yes. However, they were reactionary. Vaccination could only be used against pathogens already infecting people. Hell, the first ones used infected tissue from sick patients. Today, we can pre-emptively vaccinate people. Which is better, allowing corpses to pile up or solving problems before they arise? And as far as animal husbandry goes, it started with primative methods--but we didn't know how or why. Ever wonder why deer aren't domesticated, despite the fact that humans have hunted them for millenia? Ever ask what it would take to domesticate deer? Those are questions that are unaswerable outside of evolutionary theory.
As for climate change, the origins of man have nothing to do with it--but if you think evolutionary theory is limited to the origins of man, you simply don't know what you're talking about. There's no nicer way to put it. Every paleontologist I've spoken with (and it's a fair number) agrees that in order to see what climate changes will do to the biosphere we should examine what similar climate changes did to the biosphere in the past. These concepts require an evolutionary framework to even formulate, much less ask. If you're confused, Peter Ward has very good book called "Future Evolution", and in the first chapter he explains it far better than anyone can in a forum post.
I know you won't read it--and if you do, you probably are going to look for excuses to dismiss these arguments. However, hopefully other passers-by will see just how wrong your position is.