Should We Believe in Marx?

What follows, should one believe in Marx-ist ideas?

If you believe, if you believe.
If you believe then let it out.

“MANY People have heard of Nietzsche, Plato, and Hegel, but Marx is perhaps unique among philosophers in his ability to inspire fully formed opinions among people who haven’t read him.”

If the world is as Marx claims, then it is a class society and one class dominates the other one. In that type of society, yes. But: in a democracy ,there is freedom — of for example speech and ideas.