> Would you suggest they not vote?
Of course not. As you say, it's clearly not a significant issue for most Republican voters.
However, I think a lot of voters assume that the party reflects the values of the voters though - clearly that is not always true.
There is no candidate that does not hold policy positions contrary to at least some my own.
What they've done is decided that this issue is less important than others, and based their votes on that.