The Blessing Way

Mrs. Mulder:  I don't remember, Fox. Please... Mulder:  Will you look at the pictures, Mom? Mrs. Mulder:  Don't do this... Mulder:  Just look at them! Mrs. Mulder:  Don't do this to me.

Mulder really should know better.  Yelling at his mother isn't going to get him the answers he wants.  The woman isn't exactly the epitome of motherhood to begin with.  Plus she has some serious issues with dealing with the past.  She probably holds grudges too so that Scully/clone swap probably is really sticking in her craw.

General Punkesque Behavior

Okay, I'll give Mulder a little lee-way because he probably didn't have a chance to pick up another cell phone but he could have called Scully before reappearing from the dead.

Shouting at Mama Mulder:  Granted she's difficult to work with (like Mother like Son) and is prone to rather convenient bouts of amnesia but it is never helpful to yell at a parent.