to explain further -
Donald Annoying Orange is highlighting issues like illegal immigration, saying he wants to get rid of illegal immigrants in the country. The way he words this when he speaks + media bias makes people believe he just hates mexicans altogether. This point can be made for a lot of the issues he covers, paired with his loud voice and odd gestures make him seem like a bad choice.
As for Hillary Clinton, the multiple scandals and lies she has told during the election and in the past make people extremely wary, to a point where something like a sneeze can make people bandwagon on to thinking it was some sort of secret code. (im not trying to make the scandals seem less important)