Well, it's not exactly a "backlash." One person speaking to Radar Online just happened to state the obvious: "Beyoncé tries to stay out of the tabloids, while they're Kim's livelihood. It's an odd pairing."
Said person obviously has never had to endure the forced friendship incurred thanks to your partner's friend's partner...
Ordinarily, Kim would be on Twitter blathering on about herself, but she's been staying uncharacteristically quiet to "gain Beyonce's trust." Another handy source offered: "She's hung with them a few times already, but she isn't saying peep about them… She's not tweeting or taking pictures with Beyoncé because she doesn't want to seem desperate."
No wonder she looks thrilled these photos got taken and then tweeted by a "stranger" AKA Kris Jenner disguised as a Justin Bieber type. It's plausible; they totally have the same hairstyle at the moment.