Again, another quote from Slack:
"Paradoxically, the fear of breaking your neck (translation in corporate terms: losing your job) does not make changes impossible. It's a much more insidious kind of fear that interferes with change: The fear of mockery. If you want to make change in your organization utterly impossible, try mocking people as they struggle with the new, unfamiliar ways you have just urged upon them. There is no surer way to stop essential change dead."
Go and Buy the book if you haven't already.