Imagine you work in a large company, and have had a great time.

After quite some time working with said large company, the manager which hired you - an inspiring, warm, and empowering person - was promoted to work in another country, and instead a new manager was hired.

This manager, now your team leader's boss, hates your guts for reasons outside your control (think stuff like having kids, being "of the wrong race/nationality", etc), and to your amazement your colleagues follow suit - and your workplace is no longer engaging and fun, but mostly a 9-5 pain.

Naturally, it's time to quit. However, as this is a large company, there'll be a leaving interview, maybe a hearing, and a reason will be asked.

Since saying that the reason you quit is because the new manager is a jerk is not really an option, is it OK to quit without giving a direct reason?

If not, what would you do?

Edit: You guys have a lot of useful ideas, and the concensus is clear - telling my boss he's a jerk is a bad idea. But I'd like to try avoiding taking the blame for him in front of HR, meaning no "I'm no longer getting along with my team", or "I've received a better offer" which is interpreted as ditching the company at the first opportunity. Would a completely neutral statement, something like "No specific reason" or "No reason I'd like to share" be good idea?