In my opinion, the Hatred towards crossbows is nothing other than greed.
Fundamentally speaking a crossbow is identical to a longbow which is identical to a recurve which is identical to a compound. Note that I said fundamentally identical. There are some subtle differences, but the basics are the same: a projectile launched via kinetic energy stored in a set of limbs and transferred to said projectile by a string or cable.
Functionally speaking, there are some minor differences between longbows, recurves, crossbows, and compounds, All have certain advantages and disadvantages.
In my opinion, the pros and cons between crossbow and compound cancel each other out. Especially when you add hunting from a blind or treestand. if anything, adding these aspects tips the scale in terms of easiness or effectiveness to the compound, as followup shots are much more possible with a compound.
I think most of the disdain for crossbows comes from the misconception that making them legal will lead to a flood of gun hunters out for a longer season, treating the crossbow as they would a shotgun or rifle. They are convinced that the only people that will pick up a crossbow are gun hunters out for a longer season. I don't think this is the case, or at least it won't be lasting. While there may be SOME people that would go out and buy a crossbow if they were legalized in their state, I believe that many of them would either put them down after a season or 2, or adopt to a compound bow. They really are not all that similar to a gun aside from having a stock. If I were to sit in my treestand with my shotgun, I could easily turn around and get a shot off at a deer that was coming on the opposite side of the tree. With a crossbow, this would be difficult without risking falling and getting busted. Their trajectory is nowhere near as flat as a rifle or even a shotgun. Look at how little you have to adjust your aim point with a shotgun at 40 yards versus 20 yards. Compare that to a bow. BIG difference. People will quickly realize that the crossbow is not a "Gun that shoots arrows" and rather a bow that is held differently.
One thought I had the last time one of these came up, is suppose someone were to design a bow held similar to a crossbow, that has a stock like a crossbow, but requires the operator to draw the bow and keep it drawn. The Stock would be attached to the bow by means of a keyed shaft so that the bow and stock remained square, and at most said shaft may be dampened to slow a potential dry-fire (ie, the string is still held by the release mechanism and the stock let go) but it does nothing to aid the operator in drawing the bow or holding the bow drawn. I'm sure the anti-crossbow crowd would still find something to complain about this setup.
The funny thing is I think the people people that complain the loudest when talks of allowing crossbows in the archery season are the same ones that go out and buy the newest and greatest bow every couple of years.
Do you think of the Native Americans had the equivalent of todays bows--near 400 FPS, 90+% letoff, carbon arrows, and razor-sharp broadheads--things might have turned out differently for them? Something to think about.