The left will scream racism to win an argument when they know that they are losing.
Also, tipping off to the authority doesn't require a warrant. A warrant is issued when the entity refuses to cooperate with the authority.
This was specifically a case of racism. Motel6 targeting a group solely based on their race, not based on any reasonable suspicion (like the customer was lacking proper id, or made a suspicious comment).
That’s the definition of racism.