Professor Tariq Habib is a psychologist and TV host who is enormously popular in Saudi Arabia. His Twitter account is followed by nearly 5 million people.Recently, he underwent a successful kidney transplant. Afterwards, he tweeted his thanks to Christians and Jews who wished him well and who said that they had him in their prayers.
This apparently was too much for many people. Habib was violently criticized for that tweet.
Ever since, he has been justifying his decision to issue that tweet, saying that a simple expression of thanks does not mean that he believes that Judaism or Christianity are superior to Islam.
He even wrote an entire article slamming those who insulted him for the tweet and somewhat defensively justifying it:
The tyranny of the intellectual energy of verbal chattering, which includes violent attack and intolerance of others that are in some cases no less dangerous than the enemy's offensive weapons, so that the preoccupation with insults and the culture of hatred is the most dangerous way to waste mental energy of the individual.
...The good word or phrases of thanksgiving or even giving gifts to the Jews and the Christians does not bless their faith or promotes a culture of loyalty to non-Muslims, but it is my job to the principles of Islam, which are based on justice, to appreciate the actions of others .. to demonstrate Islam's moral pillars.
The episode seems a reveal the deep inferiority complex among many Arab Muslims as to the legitimacy of their religion. If they were secure in their beliefs, the idea of thanking people of other religions would not be considered a threat.
Habib also thanked Shiite Arabs who wished him well for the surgery, as far as I can tell no Sunnis were insulted by that.