Actually, Haitians are not the only ones who are said to stink. I had friends who worked at resorts and they all mentioned people from certain european countries who didn´t shower much or smelled bad. My aunts hosted two white Americans who had poor hygene, so she´d say that Americans stink. While these comments might not be PC, they´re unrelated to the person´s color or race, as white people get the same treatment.
Overall, Dominicans and haitians get along well. I know Dominicans who have Haitian husbands or partners. I'm Dominican and have Haitain friends and clients, there is no hate between us. I had a relative who had a school- She had both haitian and dominican kids, and they all got along well and played with each other. I used to study French at a language academy in SD and our favorite teachers were Haitian. The "rock star" teacher, the one whose class you wanted to be in, was haitian. There was no hate. My teacher was hired by the ministry of education and was on tv during the pandemic.
This is also based on my own personal experience, as I am Dominican, and have lived here all my life.