I’m with R.C. Sproul and John MacArthur, I won’t stand with Catholics because we do not hold to the same gospel. Otherwise, I fully agree.
To be brutally honest, I've heard more gravely serious error coming from mainline Protestant pulpits than I have from Catholic sources. I'd feel much more comfortable with someone who thinks that Christ is physically present in the elements of communion and who prays to Mary than I would with someone who isn't willing to admit that Christ is anything more than a wonderful concept imagined by men and who prays to a "god conscienceness" within himself.