Israel has nothing to do with this. The horrific, indiscriminate genocide of Palestine and the creeping invasion of Lebanon and Syria are all happening right now in 4K. People nowadays know that you can't destroy thousands of vehicles with AK47's, and we've seen countless videos of Israeli military personnel admitting they killed many of their own people in a 'mass hannibal' event.

You do raise one good point however - propaganda in the time of Tiananmem was much, much easier before the advent of smartphones and the Internet. And also that Israel is really, really bad at propaganda.