The "step out of line" problem in the GOP is real. It allows the extreme voices in the party to consistently target an individual politician while corralling everyone else. Meanwhile it also encourages the notion that the GOP has internal discussion and isn't very unified while voting on all issues as a unified block.
Every republican I know can name a few GOP platform positions they dislike or even find alarming, but never the less they vote for politicians who are forced to adopt every position.