IRGC commander Major-General Hossein Salami was quoted as saying that the attack would have harsh consequences.
"Account suspended. X suspends accounts which violate the X Rules," the statement on the account read.
Tehran’s response to Israel will be inevitable, Iranian parliament speaker Mohammad Bagher Ghalibaf said in a closed session.
Khamenei has served as Supreme Leader since 1989 since the death of Ruhollah Khomeini, the first to hold the title.
The Khameini.ir Hebrew account's only post so far says "In the name of Allah, the most merciful."
The idea of assassinating the supreme leader may recede slightly in favor of more vital targets. These could include Iran’s nuclear and missile program facilities.
This is not the first time that Khamenei tweeted in Hebrew, which he does from time to time.
Khamenei’s speech introduced nothing new on a strategic level. It was an ideological, mobilizing speech in which he justified the missile attack by Iran against Israel.
If Qaani is "out of business," he would not be the first top IRGC official to be booted out of office for repeatedly being embarrassed by the Mossad.
The Iranian regime appears to be blocking initiatives to send forces to Lebanon, likely because it recognizes that the damage from such a move would outweigh the potential benefits.