Can cigarettes be put in the cigar cabinet?

Better not. You should popularize cigar knowledge. Cigars and cigars are completely different tobacco products. One is flue-cured tobacco with a lot of things added, which will deteriorate with the tide. Cigars are raw cigarettes, and completely fermented products need to maintain a certain humidity and temperature to keep cigars in a state. I recommend you to read it (Cigar Appreciation Encyclopedia)