Apparently a virtue that only Conservatives can have.
The only answer is that “divisive” is a criticism that applies only to conservatives. It is not possible for a liberal to be “divisive,” however crazed he or she may be. This is true even though the whole point of a political system is to decide issues about which people disagree. If people don’t disagree, it isn’t a political issue. So to argue for any political point of view is necessarily divisive. But divisiveness is a one-way street. When liberals express liberal views, that’s just being a patriotic American. When conservatives express conservative views, it’s “divisive.”
That is, sadly, how much of our country’s establishment thinks.