Apologies, but that post is quite insulting and is nonsense. There might be individual cases, but to say that “there is an undercurrent in 'the left' that antisemitism isn't really racism,” is unsupported by evidence. To say there is an undercurrent is saying much the same as that it is systematic and institutional which is far from the truth.
To say it’s a particular problem of ‘the left’ is a lazy meaningless use of words. You said you voted for Corbyn, therefore you must be of ‘the left’ and therefore by your own reckoning you must be one of those that believes that antisemitism isn’t really racism.
Besides, show me one example, yourself excepted of someone of the ’left’ who has expressed the opinion that antisemitism isn’t racism.
Antisemitism is a serious problem that must be eradicated in the Labour party AND it is a problem that has be politicised by Labour’s, and Corbyn’s, enemies.
Antisemitism is not ‘a bit different’ to other forms of racism and no one within the LP has said it is. To say otherwise without evidence is wrong.
Antisemitism and other forms of racism are abhorrent to every fibre of a reasonable persons being and should be challenged wherever it exists. It should be challenged in the newspapers, on social media and down the pub. It should be challenged especially within the Labour Party precisely because we’re the Labour Party and set higher standards than others on this sort of thing. We challenge it because it exists and because we have higher expectations than elsewhere, not because it’s a particular problem to the party that is bigger or doesn’t exist elsewhere