Why is evolution so controversial?

Evolution is not controversial, not among scientists.Therefore any attempt to answer this question is invariably going to veer off topic to things like "Any real evidence for evolution" which I have pointed out elsewhere is also a piss poor question because the answer is, that in order to be a valid scientific theory one considers all of the evidence. If the theory is the best explanation for the data, it is a valid scientific theory and that fact will not be controversial. That doesn't mean there aren't controversies about specifics - for example, what individual fossils tell us, etc. - lots of controversy about that.