No one is admonishing anyone from kneeling before the Triune God.
We are decrying men who kneel to statues of Mary and dead people who may or may not now be alive in heaven, and assorted popes and priests and other transients who are not God, but mere men.
Read Isaiah, Mark. He is not talking about the cross. He is talking about making idols out of wood and kneeling to them and serving them as if they could hear their prayers.
Only God hears and answers our prayers.
He burneth part thereof in the fire; with part thereof he eateth flesh; he roasteth roast, and is satisfied: yea, he warmeth himself, and saith, Aha, I am warm, I have seen the fire: And the residue thereof he maketh a god, even his graven image: he falleth down unto it, and worshippeth it, and prayeth unto it, and saith, Deliver me; for thou art my god. They have not known nor understood: for he hath shut their eyes, that they cannot see; and their hearts, that they cannot understand. And none considereth in his heart, neither is there knowledge nor understanding to say, I have burned part of it in the fire; yea, also I have baked bread upon the coals thereof; I have roasted flesh, and eaten it: and shall I make the residue thereof an abomination? shall I fall down to the stock of a tree? He feedeth on ashes: a deceived heart hath turned him aside, that he cannot deliver his soul, nor say, Is there not a lie in my right hand? -- Isaiah 44:15-20 "Then shall it be for a man to burn: for he will take thereof, and warm himself; yea, he kindleth it, and baketh bread; yea, he maketh a god, and worshippeth it; he maketh it a graven image, and falleth down thereto.
The only problem with that statement is that nobody on your side actually kneels before God. You guys bray about kneeling and never do. We physically kneel before God. That is in part what separates Christians from New Age religionists.