Maybe that’s because Trump is the only one that they would not be comfortable with on this issue. Pro-life is their single issue. They are pro-life organizations after all.
This one is not about Trump vs. Cruz. This one is about Trump and his stance on this issue. Spin though you might - this is all about Trump.
If they cared about integrity, they'd question Ted Cruz and his history of lying about his positions. Fact is, these clowns don't care about the pro-life cause either. They're in it for the money just as much as any other televangelist.