The other than is to list the one exception that is not deportable. Here is the full quote again
Any alien who at any time after admission has been convicted of a violation of (or a conspiracy or attempt to violate) any law or regulation of a State, the United States, or a foreign country relating to a controlled substance (as defined in section 802 of title 21), other than a single offense involving possession for one's own use of 30 grams or less of marijuana, is deportable.
So a "single offense for own use of 30 grams or less" is not deportable. Every other controlled substance violation is. So you get caught twice with 29 grams, or once with 31 grams it is deportable.
Please go ahead again, explain how it's not.
Wow, for a guy that runs a multi million dollar enterprise...........
Apparently law is not your strong suit here. Yes, the law you cited states just that. But you threw out it would result in your immediate deportation, loss of millions, etc, etc, etc.
Permanent Residence holders are afforded their rights just as citizens, such as the right to trial, the right to defend yourself, etc. So the exaggerated presumption that a citizen would somehow get off while you, the poor pitiful PR would have ICE swoop in and
immediately deport you is just plain silly. Too many PR's have been to court and had their case heard and adjudicated. And they are still here.
And unfortunately many many illegals break even more laws while living here illegally, only to get off and go commit more crimes.