If you do not speak out against against white supremacy then you agree with it. Hap has had plenty of opportunities on this board to disagree with Trump on this one item and still support the rest of his positions. He has not done so. In fact he continues to say that everything Trump stands for is good with him.
There is no doubt that he is a white supremacist. He hasn't spoken in favor of the Klan yet so he may or may not have gone that far. But he clearly is a white supremacist.
And he clearly doesn't believe that the Constitution should always be followed. He says we are in a fight with Islam and that Islam must be defeated. The last time I checked we were not in a fight with that particular religion and in fact the constitution guarantees freedom of religion (Bill of Rights, Article 3.). So we are all free to worship Christianity, Buddhism, Islam, or whatever god we wish to follow. Remember that Thomas Jefferson owned a copy of the Koran. There are other references in the Constitution and the Articles of the Bill of Rights that also emphasize the freedom of religion.
I have never tried to do it but I suspect that it could be convincingly argued that Hitler was a white supremacist because of his hatred for Jews. Putin fits the same bill and we clearly see how Hap thinks Putin if preferable to our past US presidents!!!