How should one react in this situation?

Earlier this week, I was visiting some close family friends in the town I grew up in. I can’t quite remember how the situation arose, but my friends’ mother and aunty stated that ‘science should deal with facts rather than evolution’. I couldn’t help but tell them that evolution might as well be fact, so strong is the evidence.

This led to the two of them asserting over and over that there is proof of adaptation and mutations, but not of species evolving into other species (as most IDers do). I was asked to show evidence of this, “and not with any of that millions of years rubbish.” I decided to say no more, because it seemed this had the potential to damage our friendship to some degree, so I dropped the issue while letting them know that I don’t agree.

What would the best course of action be in this situation? I don’t want to come across as arrogant or risk the friendship in any way, but at the same time I really don’t like ignorance going unchecked, especially when it comes from religion. Is it a choice between the friendship and debate, or is there something I could have done?