Since when is asking for proof a sarcastic denial? I am not a Corbyn supporter but good effort.
I live overseas and tried to follow the antisemitism issue and saw evidence of several incidents which appeared isolated and without significant response from the party. I thought perhaps a report had shown that the problem was endemic, rife or systematic. Nothing I saw showed it as some have phrased it on this thread and I wondered what I had missed. How dare I.
I guess asking simple questions of proof of significant claim just gets you bile from @andyp etc. So much for the tolerant left/centre/delete as appropriate.