".......... Oh, I thought we were discussing horticulture and scientific
facts. Fact: Mistletoe will kill the tree, eventually ....."

So will old age,

Here in UK we have apple trees well getting on for 100 yrs old that have
Mistletoe growing on them
see pic at alt.binaries.pictures.gardens.
But we have much more rainfall so trees can survive much more stress.
I feel this is at an end so will agree to disagree.

--
David Hill
Abacus nurseries
www.abacus-nurseries.co.uk