Not in my view. If I had a job to uphold the law, and the law changed in a way I didn't agree with, it seems perfectly fair that I might choose to leave the job for my own piece of mind. But that is not "being driven out off office for my beliefs". And it has happened many times in the past, such as pacifists or others objecting to specific wars/actions. No one claimed the governments acted the way they did to drive pacifists from their jobs. It is also not unknown for ministers to leave governments because they disagree with proposed policy, but it rarely regarded as the minister being driven out of office for their beliefs.