I seen the article elsewhere on here. The important thing to note is that this is an opinion of the Pope, he is not changing Catholic teaching which is against homosexuality. In this interview the Pope only represents himself as this article states:
Is the Catholic Church changing its approach to marriage? Francis’ views on legal civil unions—which he previously expressed while archbishop of Buenos Aires—differ from those of previous popes, but he hasn’t changed Catholic doctrine that marriage is between one man and one woman.
Pope reiterates support for civil unions
and
Vatican backs Biblical view of gender
The problem the Pope needs to stop doing things like this, he forgets himself
Well whatever happens, what God teaches remains solid.
I hope the Pope does not change the teaching of the Catholic denomination though.
But if he does, since there is a real possibility, would there be a split in the Catholic denomination who disagree with any new teaching?
I believe other denominations have split over this issue before.