Without watching the videos, I would say there were no wranglers present. I would also guess they use horses when appropriate, as in rough terrain to apprehend people. In my opinion, border patrol was probably doing the best job they could, given the situation and the stress level. I don't think they were whipping these people. Grabbing them and wrangling them, yes. That is their job.
https://pbs.twimg.com/media/E_1yQBIV...jpg&name=small
At first glance of the picture, I did think of a slave being whipped. But that was at first glance. After I studied the picture and read some of the comments, it does look like a horses rein loosely flying in the air. This picture is probably not the first time illegal aliens of any race were apprehended in this manor.
Whipping people is wrong. Is using a horse to round them up wrong, when they are misbehaving? I don't think border control was being racist. That's my opinion.
On the other hand, my guess is that Joe Biden is secretly racist.