My colleague is from Iran but live and work in my country (in the EU). Last year my company were sponsoring a tech conference in the US and him and a few of my

My colleague is from Iran but live and work in my country (in the EU). Last year my company were sponsoring a tech conference in the US and him and a few of my other colleagues were going to attend the conference (he's the lead engeener on a product that we were going to publicise at the conference). He was denied entry to the US simply because he was from Iran, so it hasn't been all roses. But now it has just reached insane levels.