Well the country is going to commit genocide anyway. Why not try to sell them the weapons because we make much better weapons and US companies haven't been able to break into their weapons market yet.

The potential benefits could be substantial, we could be the first big US weapons manufacturer to break into this regime's market. Over time, economic ties could bring the countries closer together and reduce the likelihood of conflict...

Do you see how insane it is to justify something morally repugnant with potential long term economic benefits? The only way your argument works is if you don't care about censorship in the first place. If that's the case, then you need no justification at all because it's just another regular customer.