Yes, they are openly against voter ID laws because there is no evidence for widespread fraud of the type you suggest. And they cite several studies. So rather than simply accuse them of bias, refute the studies. 

And no, the tiny number of occurrences do not merit "inconveniencing" everybody, especially when proposals for "inconvenience" nearly always target minorities (something that even the Supreme Court recognized recently), make it more difficult to many to vote (again, I cite the long lines that happened even in Denver), and therefore make the US less democratic. You seem to be a gun rights advocate - should your right to own a handgun be restricted because some people use handguns to commit crimes?

Finally, I don't understand why any Coloradoan would be in favor of giving up the mail-in ballot, unless he/she is unemployed or retired. There have been times in my life when, because of work and school, it was impossible for me to vote on election day. That's not "inconvenience."