Corbyn is genuinely principled - you only have to look at the choices he makes as a politician in contrast to others for that to be obvious. How often has he shunned the limelight and refused to take pot shots at the Tories when doing so would have won him acclaim all round? The irony is, British politics is dead on its feet for want of leaders who will put their principles ahead of the self-serving popularity contest and when we get one, we don't like him because he doesn't try hard enough to make us like him.
He's a lot more principled than the element within the Labour party who voted for the Iraq war and are now 'suspending' branches of their own party which support Corbyn. 
Whatever Corbyn's failings are, there is bloody nothing to suggest that his opponents could find their way out of a paper bag without arguing, lying and getting into a punch-up while still in it.
Corbyn was misunderstood in his use of the word friend - he uses the word 'friend' when talking to hecklers who clearly hate him - it is his way of finding common ground as a step to communication, in the interests of improving the situation for everyone. It comes from a desire to have a politics that overcomes difference and hostility by including everyone.
As for Israel, there's something wrong with the world if we can't say that what they're doing to Gaza is heinous. It's a pity they didn't make Germany give up land at the end of WW2 rather than picking a nation that had nothing to do with the atrocities that led to the new Israel. No other country gets to live and make (oppressive and selfish) decisions free from censure. When other nations suffer as a result of it, maybe they shouldn't get to either.
I haven't noticed anyone on this thread saying that Corbyn has the support of the country - he has a great deal of support within people who want to vote Labour. Other people within the Labour party cannot overlook that because it's inconvenient.