To the BTC "true believers", we're like the scabs crossing the picket line.
Because Satoshi's original vision was a peer-to-peer network and cutting out the big money banking system, XRP is thumbing their nose at the pure philosophy of crypto by working with the banks. (In their viewpoint) XRP isn't "decentralized" because it's being controlled by one company. Of course they won't talk about how their beloved BTC isn't truly decentralized either. When you have a small handful of Chinese operations mining the majority of the BTC, I don't think you can really call yourself "decentralized". But because Ripple chooses to work with the banks, they see us as shitting on their purist philosophy.
Don't worry about it. As they say, "Haters gonna hate."