All those politicians held their views while they were in other parties.
The article also says "A Reform spokesperson said the party does not have a stance on abortion and has no intention of making changes to the current abortion laws."
Of course, we must keep a very careful eye on all parties to watch out for them moving in a destructive direction, but there are a lot of people who are interested in painting Reform, and indeed any party, in a bad light. It's a good idea, and certainly better for the blood pressure, to keep track of what a party is actually saying, rather than what their opponents say they are saying.