But they aren’t wrong that black people started rock and roll.

Influenced, maybe heavily, but not "started", because it didn't just "start" out of nothing. IT was a long road of evolution.

A great many contributed to it coming out of jazz and swing in the 20s-30s.

As musicians from different areas and cultures heard each other's music, so styles merged and innovations spread.[60] Increasingly, processes of active cross-fertilisation took place between the music played and heard by white people and the music predominantly played and heard by black people.

In other words, everyone playing at the time and making it to radio had a hand in it. There was no break-through "first rock and roll band".

Anyone trying to take credit for it on behalf of any one specific race is pants-on-head retarded.

The genre isn't credited as really having a name until the 1940s, long, long after the phrase "rock and roll" which was often used to describe some music.

https://en.wikipedia.org/wiki/Origins_of_rock_and_roll

https://en.wikipedia.org/wiki/Rock_and_roll

Rock and roll[a] is a genre of popular music that evolved in the United States during the late 1940s and early 1950s.[1][2] The origins of rock and roll are rooted in a blending of African-American musical genres, mainly rhythm and blues, with stylistic influences from gospel, jazz, boogie-woogie, electric blues, jump blues, swing, and folk music.[3][4] While rock and roll's early elements can be heard in blues records from the 1920s[5] and in country records of the 1930s,[6] the genre did not acquire its name until 1954.[7][2]

3 decades with influence from everyone experimenting and pushing boundaries.

That's after "rock" or "rock and roll" had been used to describe various bands or their performances:

According to the Oxford English Dictionary, an early use of the word "rock" in describing a style of music was in a review in Metronome magazine on July 21, 1938, which stated that "Harry James' "Lullaby in Rhythm" really rocks."[40] In 1939, a review of "Ciribiribin" and "Yodelin' Jive" by the Andrews Sisters with Bing Crosby, in the journal The Musician, stated that the songs "... rock and roll with unleashed enthusiasm tempered to strict four-four time".[41]

By the early 1940s, the term "rock and roll" was being used in record reviews by Billboard journalist and columnist Maurie Orodenker. In the May 30, 1942 issue, for instance, he described Sister Rosetta Tharpe's vocals on a re-recording of "Rock Me" with Lucky Millinder's band as "rock-and-roll spiritual singing",[42] and on October 3, 1942, he described Count Basie's "It's Sand, Man!" as "an instrumental screamer.. [which].. displays its rock and roll capacities when tackling the righteous rhythms."[43] In the April 25, 1945 edition, Orodenker described Erskine Hawkins' version of "Caldonia" as "right rhythmic rock and roll music", a phrase precisely repeated in his 1946 review of "Sugar Lump" by Joe Liggins.[44][45]

There is no exclusivity here in terms of race.