This isn’t some right-wing talking point.I'm not clear that he's doing so. What makes you think he is?
In March, El Salvadoran President Nayib Bukele said that when candidates Biden and Harris vowed in the Democratic primary to give illegal immigrants free health care, it was an “incentive” for people to attempt the perilous journey to the United States. And last week, ahead of Harris’ visit, Guatemalan President Alejandro Giammattei blamed Team Biden’s wink-wink pro-illegal-migration rhetoric for the surge.
Giammattei said, “The message changed, to: ‘We’re going to *reunite families, we’re going to *reunite children.’ The very next day, the coyotes were here organizing groups of children to take them to the United States.”
https://nypost.com/2021/06/13/bidens-illegal-immigration-welcome-mat-caused-border-crisis/