I'm going to interject here.
Almost no one supports racism. But
polling has shown that more than a few people support positions that parallel those of white supremacists. Here's an interesting tidbit in that vein. People on this board constantly complain about Antifa. Yet more people support White Nationalists, the alt-right and Neo-Nazism than people support Antifa.
If Antifa really is a big enough problem worthy of discussion then these White nationalists, alt-right and Neo-Nazi organizations are also a big enough problem to warrant discussion.
Now here's where it ties back to the lies. The people who downplay the amount of white supremacist racists in the country are often (but not always) the same people who are downplaying the President's lies. These are people who don't want to face the problems in their backyard because of who is the source so they're pretending that they aren't problems.
They're ignoring the white supremacists and saying "not a big deal" but by their own metrics, they are big deal because they're bigger than Antifa and Antifa is a big deal. They're ignoring the President's lies and say "It's not a big deal," but they've already shown that they're incapable of measuring the amount of negative behavior coming from the right. In short - they don't know what they're talking about.