"It's just a piece of CLOTH that is MAN MADE with an image on it. There is nothing special about it.
Needless to say it is a FAKE too!!!"
Those are assertions which are scientifically testable by studying the cloth itself.
Modern forensic science can tell us if the image was painted on, burnt in, or formed by biochemical processes.
Art history can tell us if there is any other work of art that uses anything like this "technique", if it is man made, and can tell us whether the "technique" used to produce it is repeatable by us even today.
If it's a fake, we should be able to make one just like it.
If we can't, and we can't find paint, brushstrokes, or any other forensic traces of human activity creating it, then there is no scientific evidence to substantiate the claim that it is a fake.
We cannot stand with dinosaur bones in our hands and scream that dinosaurs never existed because they mess up our preconceived timelines.
Empirical science roots us in Truth.
Likewise, we cannot assert "It is a FAKE, and MAN MADE" if forensic science finds no evidence of that.
If we are interested in the Truth, we will approach the subject with sober science. Blank assertions unsupported by peer-reviewed science are groundless opinions. They are gratuitious assertions, which can be gratuitously denied by the standard rules of logic.