why do the Democrats label every Conservative Group as far right extremists white supremacists?

Fear.............................

Because they demonize ANYONE and EVERYONE that doesn't agree with THEY'RE viewpoint or political agenda that's one way they indoctrinate new blood into they're agenda they're other way is to promise them a free existence funded they claim by ONLY by taxing the wealthy the very same wealthy that supports THEM!! What they neglect to consider the wealthy are NOT going to give up THEY'RE income by taxes or support the very people or group that intends to tax them they're going to support the people that allow them to keep they're money so just WHERE will the tax money NOW come from??? The VERY people that voted them into office!!!   

      Why? ... Because, Trump and the most prominent conservative media sources are and have been promoting right wing extremist views and relating them directly to the Republican Party, the heart and soul of the modern conservative movement today.

      Granted, there are Never-Trump conservatives. But, their positions don't get the exposure needed to offset the radical positions of Trump-Republicans. And, the conservative responses to questions posed here, on YA Politics, are no exception. 

      The Republican Party has become an autocratic anti-American radicalized right wing political party. And, that perception won't change until moderate conservatives become the solid majority in the GOP or gather to form their own party in opposition to the GOP.

Demonizing and dehumanizing political opponents are propaganda tactics used to make a totalitarian regime possible.

You see from many of the comments here that it is effective on large numbers of people.  They’ve been prepped by government schools’ indoctrination.

Well , we don't label EVERY group of anti-american cons that way. 

Many of them "we" label as Christo-Fascist American Jihadi's.   

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We don't think that about the Lincoln Project, just the far right extremist white supremacist groups who planned and executed the insurrection.

To promote their hate. If we only have one party then they would have total control. 

They call it like they see it

That's the book definition of "conservative"