The division and hatred comes from those who want divorce/remarry and same-sex marriage and can't force the Catholic Church to change God's moral absolutes.
So they become hateful themselves and call the Catholic Church divisive and hateful when it continues to UPHOLD the laws of God. Those folks sound like whining nine-year-olds.
Laws of God are MORAL ABSOLUTES, nothing less.
There are too many timeless quotes in that small book, but I'll hazard one.
The gay, pro-sodomy movement can be categorized presently as a mass movement, and, at least for gay sympathy, the critical mass of sympathy, if not outright support, has drifted into the mass movement category. This is the subject of Hoffer's book :
"All mass movements generate in their adherents a readiness to die and a proclivity for united action; all of them, irrespective of the doctrine they preach and the program they project, breed fanaticism, enthusiasm, fervent hope, hatred and intolerance; all of them are capable of releasing a powerful flow of activity in certain departments of life; all of them demand blind faith and singlehearted allegiance."
Emphasis mine.