"If Pippa changed her ways and disavowed her past actions and that part of her community, then-"
Then you would still find reasons to think she's problematic, until the day she no longer exists, because she already did and regularly does. The evil alt-right fans of hers, doing such evil things that they can not be repeated and you'll just have to trust me sweaty, will completely vanish from their discussions as well the second that Pippa hangs up the rabbit ears, and there will be much rejoicing - until the next boogeyman that they prop up as literally hitler (actually, for real this time, guys we promise)
The more that anyone has to go out of their way to proclaim just how bad and totally evil something is, the more I'm inclined to believe they have skeletons in their closet that they would rather not come to light.