Yes, it is. Praying for another person's death is bad ju-ju.
Well tough. I want all the enemies of my country dead, or at least totally incapacitated. If I get some black magic karma nasty consequences, it's the least I could do for my country.
Sometimes when death calls it is a blessing. Surely in this case...
Which reminds me of Mark Twain touring the catacombs with another American, a doctor in "Innocents Abroad". They found they could set off their Italian hosts by asking of a Renaissance Artist whose works they were expected to admire, "Is he dead?", invariably eliciting an irrated "Whadda you mean, he Renaissance dead 200 years!" Touring the catacombs they were shown the carefully arranged remains of a former head abbot who had died about twenty years previous. The doctor formed the question on his lips "Is he ..." but was dissuaded by a scowl from MT.