well, it's not costing Colorado much now that it is legal. And my guess is making illegals as legal as pot in Colorado would have the same effect.
the problem is, with drugs you are dealing with a bunch of puritans who have never gotten high
and with illegals you are dealing with a bunch of racists who fear anybody that doesn't look like Mommy
Geez, and when we have a fatality in CO due to some bozo high on weed you liberals will say "well we didn't expect that to happen". And I know how wasted one can get just on weed. And the weed of today is a lot more potent than back in the 70's or 80's.
As far as your last statement .. it has nothing to do with being racist ... it has to do with not wanting support people here illegally. That's really not that difficult to understand, at least with people paying taxes.