Columbia University president Lee Bollinger invited a genocidal madman who leads an Islamic supremacist rogue state dedicated to the destruction of Israel to speak at his school.

But he draws the line at bathroom graffiti.

NEW YORK — An anti-semitic message that included a swastika was found etched into the wall of a bathroom at Columbia University on Thursday, just two days after a noose was discovered hanging from the door of a professor at Teachers College.

In a message to the Columbia community, President Lee Bollinger said he was saddend by the second incident of hate in a week.

“One of the bathrooms in Lewisohn Hall -was sullied with an anti-Semitic smear,” said Bollinger’s note. “It has been promptly removed and is now being investigated.”

Bollinger said such behavior would not be tolerated.

“Despite the irrational, destructive hatred that persists in our society and world, we do not accept this anywhere at this University. No one among us should feel marginalized or threatened by words of hatred.”