Not sure how that makes him an easy target.
Simple the Russians are setting him up. For example, Russian trolls pretending to be "Bernie Bros" generating outrage.
Maybe. However when they say that Russia is attempting to help his campaign, we have no idea what that means. Is it a few facebook ads? Is it a massive effort to hack every voting machine? Or are they reading the Secret and making a vision board?
Seriously. This is an important point in what this means. If it's just a bunch of shitty facebook ads then I'm not going to waste my time worrying about it.
It's a lot more subtle than a few facebook ads or memes, it's weaponized social media. They are very good at it and getting better all the time.
Here's a test for you, the next time you read something on-line that is outrageous, and gets you hopping. Stop reacting, go digging and see who is pulling your strings.
Remember the facebook group called "Heart of Texas" they used to post anti-islamic stuff and anti-immigrant, you know the stuff, pro 2A, strong christian, and so it goes... they heard an islamic group was organizing a rally in Houston so they organized an armed counter rally. Guess what?
https://www.washingtonpost.com/news/democracy-post/wp/2017/10/17/how-the-russians-pretended-to-be-texans-and-texans-believed-them/The sad truth is that Americans are gullible, and the Russians know how to play the game better than anyone else at the moment.