Here's something I found on the Spirituality and Practice site:
We must love them both —That's actually a very intriguing practice. Hard but thought provoking.
Those whose opinions we share,
Those whose opinions we don't share.
They've both labored in the search for Truth
and have both helped us in finding it. —
-- Thomas Aquinas quoted in Imagining the Sacred by Vernon Ruland
To Practice This Thought: Make a list of people you agree and disagree with and then contemplate it with love.