Paigntnian 19:16.
"Tory MPs and Tory Party members are not racist. There may be a few but no more than in other organisations. Labour has, at least in recent years, been antisemitic and provably so."
I could riposte - "Labour MPs and Labour Party members are not racist. There may be a few but no more than in other organisations. Tory has, at least in recent years, been Islamophobic and provably so."
You can't prove your view is right, any more than I can prove mine.