I have seen large amounts of intolerant people latch onto this philosophy always seeing it as a justifying their own intolerance. Never, ever do people see themselves as those who are so intolerant that they need to stop being tolerated for the greater good of society. So I've found this philosophy to be a bit self-mastrubatory way for the intolerant to fancy themselves as simply "bombing for peace".

I do find poppers actual philosophy to be interesting though. I'm just amazed how often the "paradox of tolerance" is used to justify gratuitous suppression and violence.