When someone is publicly honored by having a statue of them erected on government property, what is being honored is what the person stood for in life, or in the most significant moment of their life. A statue to Martin Luther King Jr. is not a monument to adultery or plagiarism. It's a monument to someone who led the Civil Rights Movement despite being jailed for it, death threats and attempts on his life. He may have been guilty of adultery or plagiarism, but those things aren't what he stood for. Obviously.
I'm not anti-Christian. I'm anti-stupid.