Why did Euro/US delegates walk out of anti-racism conference when Ahmadinejad talked his/his ppls perspective?

Stating the facts is not anti semite, it's the facts, if Israel doesn't like the way it's seen by other countries, then perhaps they should have a good look at what the rest of us are looking at, geonocide, illiagal occupation, Gaza holocaust, how would they like him to rephrase it????