This is very true - to the point that people aren't willing to take even serious and constructive criticism because it's swallowed up in the avalanche of ISRAEL IS OPPRESSIVE APPARTHEID foolishness that's coming from abroad.
A good example was this flotilla. Nobody was interested in listening about actual errors the Navy made - everybody was talking about how the foreign media was being self-righteous and unfair - which it was. There were protests in support of thE Navy, and several groups paid good money to have billboards put out to support it. There were even ad campaigns capitalizing on this sentiment.