why can't democrats understand there is NOTHING wrong with being made to prove who you are by id before you vote in any way ?

Because the voices in your head say so. There is plenty wrong with voter suppression in those “Voter ID laws”. For example purging eligible voters. The fact that you are more likely to be shot and killed by a “law abiding citizen” with a gun than encounter voter fraud is a clear example of the warped priorities of regressives.

What about closing the polls when most people are just getting off work or something as petty as not being able to give water to those standing in line? 

That would eliminate 50% of their voter base!

Being morally correct has nothing to do with any democrat policy. In fact, I can make a good case for the opposite. Here's a theorem I use to predict democrat policy: Given any two viable options; Democrats will always select the option which will yield the greatest, long term, immoral outcome. (Yes, I said "always")

They know this. But they have to lie, or they have no other argument.

They're  just mad because now its making it harder for them to cheat