Garrard said the party has failed to expel members espousing "the grossest derogatory" comments about alleged Jewish conspiracies and characteristics.
"It's something I have consistently taken action to tackle, both through investing in security to protect our Jewish communities and through education, with the creation of a national Holocaust memorial to remind us all where hatred can lead if left unchecked", she continued.
Speaking to The Observer, the former donor said: "I have watched with dismay and foreboding the manner in which the leadership has, in my view, over the last two years, conducted itself".
Speaking to the Jewish News after this week's row, he said: "I did say that processes in our party had to be speeded up and that all of the recommendations of the Chakrabarti report had to be carried out so that we could address the issue".
'Ready Player One' has plenty of game The special effects going back and forth to the real world and the OASIS was, for me, what seemed like it could have been hard . Ready Player One is, for the lack of a better term, the sum total of the era we now exist in and have grown up on.
It followed the revelation last week that she had opposed suspending a council candidate accused of Holocaust denial.
The resignation comes amid allegations over rising anti-Semitism among the party's ranks and escalating protests, organized by Jewish groups. "I consider that it has supported and endorsed the most blatant acts of anti-Semitism". So there no longer exists a party which even pretends to maintain and promote the principles and the integrity of what always was, to me, the Labour party. The party has now vowed to implement the full recommendations of its 2016 internal inquiry into the issue. It has no place in our party.
Corbyn has sought to try and get hold of the anti-Semitism scandal engulfing his party after a demonstration outside Parliament over his handling of it. Accusations are examined by an NEC panel that meets only every three months. So, at this special time of year, let us all pledge to stand up and make our voices heard in the face of antisemitism.
Corbyn had been enjoying a relative lull after an nearly constant media spotlight on cases of alleged anti-Semitism within Labour's ranks through 2016 and 2017.