We downloaded tweets going back to July 2015 containing the hashtag #IStandWithIsrael. There are several spikes, including two in mid-2016. Let's focus on those.
Restricting the time range to tweets between 5/1 and 9/1/2016 leaves 25404 unique tweets (73373 including retweets) from 989 accounts. Of the 20 that received the largest number of RTs, 14 have #PJNET in their profiles.