Can a vineyard grow unless it is pruned? According to Messiah it can not and we are ALL constantly being pruned for the day of harvest! It is just that some of us see the profit of pruning for the good of the whole body of Messiah and others like Hoggard reject the pruning and continue to enjoy and feed off of the weeds.
“How can one call out a false prophet without pointing our his heresy?”
How about you follow the procedure give by Jesus in Matthew 18, and go quietly to him to explain to him your problem with his teaching. If he doesn’t listen, go with some of your brethren to establish at the mouth of several witnesses that he is recalcitrant. If that doesn’t work bring him before the entire church (but, of course, you consider the entire church heretical).
The fact is, your statement above is begging the question, since you assume Sunday is a heretical day for worship and rest, and therefore Hoggard is a false prophet. It is not established by anyone except a few that Sunday is indeed heretical.
I find Hoggard obnoxious for throwing muck at the Sabbath Keepers and I find you obnoxious for throwing capitalized muck the other direction.
Peter defined heresy in 2 Peter 2:1, where the word “even...” can mean, “that is to say...”. It had nothing to do with special days or observances, but with the 100% efficacy of Jesus Christ’s work in earth and in heaven.
I suspect you see yourself 100% dependent on Christ’s work on your behalf, right? And you are talking about the Christ of the Bible, not some gnostic fabrication, right? Then how can I condemn you for heresy. We can discuss differences about how we worship the only Lord who saves us. We can discuss the role of works and perhaps even differ on them. We can discuss a lot of things.
But it is an arrogance of power to thunder condemnation on others who share the same precious faith. It will have consequences. I suspect that you may not believe that.