Dr. Craig is a liar.

[SteveII]

The mathematical meaning of the term "actual" in actual infinity is synonymous with definite, completed, extended or existential,[1] but not to be mistaken for physically existing. The question of whether natural or real numbers form definite sets is therefore independent of the question of whether infinite things exist physically in nature. https://en.wikipedia.org/wiki/Actual_infinity 

Are you saying that physicists believe there to be actual infinite quantities of anything (objects or events) in the physical world?

Yes.

This is typically where you would give an example...post a link, I would like to read it.