You can feel like it is murder but "murder" is a word that has a certain meaning that is very clear.

mur·der
[ˈmərdər]

NOUN
the unlawful premeditated killing of one human being by another.

"unlawful", thus when you kill someone within the boundaries of the law, such as with an execution or in cases of self defense, it is not murder. That is just what the word means.

Because some group calling themselves "the masters" or "the government" said so doesn't make it right.

It does not make it right but it does make it not murder.

People who trade in dirty inconsistent unlabeled poisons that kill 60,000+ Americans a year are not really selling a merchantable product and they are evading the taxes that we may not like but we are paying, which screws us. We expect that things will be labeled and the label will represent accurately what the product is at a minimum, illicit drugs don't meet that standard. The solution is to legalize them and regulate them just like any other food or drug. Trump does not see that because his brother died from drugs and he was in his prime in the 80s when being tough on drugs was cool.
One shudders at the thought of Hillary despite Trump's obvious flaws. She wanted to retain the federal prohibition on medical cannabis as well.