I have heard the comparison made between the Christian faith and a pizza. It was said that with pizza, as long as you have crust, sauce, and cheese, you can put whatever you want on top and it remains a pizza. It doesn’t matter if you have sausage, onions, anchovies, or whatever. Pizza is pizza as long as it has crust, sauce, and cheese.
And so the Christian faith is still Christian as long as it has some essentials, like Jesus, the Gospel, and faith. You can add whatever you want on top of that to suit your own fancy as long as you have the essentials. My question for people who think this way is this: how much garbage do you want on your pizza?
Would you eat a pizza covered with mold, rotten tomatoes, dirty shoestrings, or used Kleenex? Of course not! Why then would you tolerate a Christian faith where there was clearly false teaching? Why would you want to listen to a false prophet? If something is untrue then it is a lie. If it is a lie then it is garbage. If it is garbage then it has no place being taught in the Church of Jesus Christ.
May God grant us His grace, through His Word and Sacraments, to see the false prophets for what they are, and to cling ever so tightly to Christ alone.