It seems that he found the video and the content interesting and re-posted it. I don't think he specifically selected any particular uploader of the video.
Personally, I would have thought the rat was an identifying emoji belonging to the uploader. Like a watermark.
But the assumption is that he knew about it.
So good has come out of it. Now we know and now more people know about Zionism and Israel. Win-Win, wouldn't you say?
No need for all this hysteria and attempts at mind control.