Well, yeah! Have you been listening to him?

(1) He attacked Muslim Gold Star parents
(2) He claimed a judge was biased because “he’s a Mexican”
(3) The Justice Department sued his company ― twice ― for not renting to black people
(4) In fact, discrimination against black people has been a pattern in his career
(5) He refused to condemn the white supremacists who are campaigning for him
(6) He questions whether President Obama was born in the United States
(7) He treats racial groups as monoliths
(8) He trashed Native Americans, too
(9) He encouraged the mob justice that resulted in the wrongful imprisonment of the Central Park Five
(10) He condoned the beating of a Black Lives Matter protester
(11) He called supporters who beat up a homeless Latino man “passionate”
(12) He stereotyped Jews and shared an anti-Semitic meme created by white supremacists
(13) He treats African-American supporters as tokens to dispel the idea he is racist

Want more detail, then read this article:

Here Are 13 Examples Of Donald Trump Being Racist | HuffPost

Any one of these makes calling him a racist true.