[PIF]

delenda est Islam!

Is the correct Latin grammar.

[UnbelievingScumOnTheOtherSide]

delenda est Islam! Is the correct Latin grammar.

There is a correction possible for the Latin pedants among us, but that isn't it:

"Islam delendum est"

wikipedia.org: Carthago delenda est

The Authenticity and Form of Cato's Saying 'Carthago Delenda Est' (full article is not free)

[Jabba the Nutt]

This is an obvious play on the phrase Cato the Elder used in the Senate during the Punic Wars: Carthago delenda est. Carthage must be destroyed.

So, our friend ought to say Islam delenda est.