The Bible gives us guidelines for clean and unclean animalsm. In a nutshell, if you look at the commonalities of what comprises clean meats and unclean meats, as close as possible, vegetarian animals that are not scavengers are considered clean.
Unless you can show me that cicidas are insect carnivores or scavengers, I think they fit the Biblical guidelines of what would comprise a clean insect.
Did you buy enough butter?
Cicadas don’t eat but rather drink tree sap, so eat away.
Totally off topic, but I want to know why pork has been dirt cheap for at least a year, but bacon still costs $7 a pound!