Tbh, if Owen said something along the lines of "Egging political opponents is fine" then fair enough - but he explicitly said "Egging a Nazi"
But as much as I dislike Corbyn (also Owen Jones on that matter) he isn't a Nazi & the comparison doesn't work & isn't very clever. The slightly more insidious aspect is to further push the narrative that criticism of the state of Israel is somehow akin to Nazism.
Antisemitism in the Labour party is more complex than the narrative will allow,
People who are antisemitic and have an Islamic background will support Labour due to the leaders stance on Israel.
People who are antisemitic & have a English nationality will tend to vote for the BNP/UKIP/Conservative party. (due to them being less likely to have pro immigration policies).
However, the vast majority of normal Conservative party members or Labour members are not antisemitic & neither party has any policies which come anywhere near it. The issue comes from the fact that only half of the known antisemitic side is spoken about in the most popular media.
On-top of that we have the media & Israel (as of the leaked tapes) openly stating them want to smear anybody who doesn't outright support them as being a racist. The media doesn't like JC due to his stance on high earners and tax, not that I believe it's some massive conspiracy.
Just more unenlightened self-interest.