Here's a link to a fraudian article about it. Not read all of it but this little nugget leapt out:

Wimbledon’s decision came after the UK government had initially floated the idea that the All England Club could require Russian players to sign a document condemning the Russian leader Vladimir Putin if they wanted to play. However, that idea was rejected as unworkable, with Wimbledon fearing it could place the families of Russian players in harm’s way, as well as creating a dangerous precedent.

Loyalty pledges for all! Hoorah!

Also, excellent point about the anti-BDS crowd. We can't seem to ban Israel from massacring civilians, just imagine if someone tried to ban them from something important like a sporting event!