Fair to ask because if you think social welfare programs and abortion on demand are needed in our society, you will not like strong Conservatives one darn bit because it is too extreme. If you think the borders should be open to everyone just trying to escape a bad place, you will likely want democrats because the right wing is too extreme. If a strong border protection is not conducive to furthering your personal agenda, you want democrats in power because they are logical and not extreme like those damn Conservatives.
If you hate Limbaugh, it is likely because you think he is way out there when in fact, he does not lie and he is extremely honest and accurate. but for some/many, he is too far out there; a nut case if you will.
If you read stories about Sarah Palin, you might conclude she is a nut. In reality, her honesty is refreshing and if you are honest, you will know that she was better qualified than Obama to run this country. But the press painted her as some evil crazy woman and praised Obama, who is not a nut, according to many people who really do not know better.
Saying someone is a nut or too far out there or too extreme is not fair in most cases because most people read what a predominantly left sided and ever so biased media reports. So we naturally think Palin is a nut because the media is biased.
As for Reid and Pelosi, delve deeper into their records and speeches and you might discover what they are all about.
But I agree, if you say someone is a nut or too far off their nut, a few examples are required and in context.