Jackson certainly had his unsavory side. But I don't believe in wiping out of history our leaders of the past because they don't measure up by today's standards. The entire world was less tolerant and more racist and xenophobic in Jackson's time. Jackson was a President whose legacy was the annexation of Texas and a greater degree of democratic features in our form of government. Tubman is worthy of the honor of being on a $20 bill, but Jackson doesn't deserve to be dishonored by being judged in an ex post facto way.
taking him off of the front of $20 does not equal "being dishonored"...to the extent that part of the reasoning for using the $20 is Jackson's unsavory side, that really doesn't bother me. I mean Adams isn't on any currency at all (that I know of ). Is he dishonored by not being featured?