It depends upon the degree to which MacArthur funds PPUSA and whether the funds are restricted or not. Last I checked, proportionality is one of those tools we are required to use in such matters lest we fall into the sin of calumy. Catholic Charities takes money from the United Way, which also funds Planned Parenthood, but the total funding of UW is so large that it does not make a material difference. By your standards, we should burn every bishop at the stake for the sins of Bernard Law and possibly Justin Rigali in ignoring or abeting child abuse. You pull the abortion card, expect the abuse card and no real dialogue will happen.