If they aren't, they are often lamented and can become divisive and distracting.
From the canberratimes.com.au
The president ignored many of the most divisive issues separating the two sides.
From the suntimes.com
It's a particularly bonding music, he says, and yet a particularly divisive one.
From the cnn.com
We do not need a senator pushing a divisive agenda, we need a consensus builder.
From the jsonline.com
It's like, they're waiting to trounce on anything that, once again, is divisive.
From the inrich.com
Could you give me your view on this divisive issue from your side of the border?
From the time.com
He knew his film would be divisive, in fact everything about it had been a risk.
From the nzherald.co.nz
Will they insist we refrain from divisive rhetoric in a manner they rarely have?
From the nzherald.co.nz
The question isn't just how divisive this Budget may prove within the coalition.
From the globalspin.blogs.time.com
More examples
Dissentious: dissenting (especially dissenting with the majority opinion)
Having a quality that divides or separates
(divisiveness) The characteristic of being divisive
(Divisiveness) Speaking ill of or disagreeing with socialists or socialism. Divisiveness is one of the worst things in our society today and is largely perpetrated in talk radio, blogs, private conversations, etc., by members of the pig Bourgeoisie. ...
Any policy that might give our opponents more votes than it gives us.