I read that Kahane members were instructing their followers, to pray for Ariks health to deteriorate. This is very depressing to me. I will pray for a complete healing. Although, I don't agree with some of his decisions, G-d is still in control.

I agree with you Janet. If we believe that Sharon was put in office by G-d, then even if he deviates from G-d's plan, we should not pray for his demise. While it is just to pray that he will turn to G-d, or even that G-d will remove him if he does not, it would seem wrong to pray for his deterioration of health. Recall David's reaction when he learned that one had lifted his hand against G-d's anointed (Saul)? While clearly Sharon was not anointed in the same sense as a king, and clearly G-d can remove him for health reasons if he so chooses, it seems wrong that we should seek his removal by deterioration in health.