As a Starmer supporter, and somebody who voted for him, I’m extremely worried about this development. Starmer held himself up as being on the soft left of the party during the election campaign, but his actions since then have been to: dismiss virtually every Corbynite from the shadow cabinet; sack RLB for liking a tweet; and now suspend Corbyn himself for the wording of a statement (no-one is arguing that the statement itself was in any way anti-Semitic).
Starmer does appear to be trying to bin the entire left wing of the party. He may feel this is politically expedient, but it goes against everything he said in the campaign about his genuine Labour values.