That is a common misconception born and perpetuated by the left and it's propaganda wing, the MSM.

Our porous borders have allowed anyone through that wants to cross. Mexico, like every other place, has it's share of rapists and drug dealers. When Trump made mention of this, the media created the story that Trump is calling Mexicans rapists and drug dealers to convince people that Trump is a bad person. And, what do you know? Here you are - but I do appreciate that you are asking about it instead of just assuming.

Well, you already know, but he never said such thing. What he said was true. Mexico and other countries are not sending their best and brightest to SNEAK into the United States. I used to hop freight trains. I know first hand, the caliber of people that are coming in illegally. People are people the world over, but there is a disproportionate number of extremely cut throat people coming into the United States by other than legal means. It doesn't take a rocket scientist to see that.

Do you work Mario Bro ?

Another reason to talk out against him.

To get elected

Calling foreigners rapists etc. is just another way of telling Americans how great, fantastic, superhuman, brilliant etc. they are. That's what his supporters want to hear. We have the exact same situation in many European countries. And the crowd eats it up.