Are liberals inherently dishonest?

Today as I was driving into work I noticed a bumper sticker that read "Liberals Lie". Seeing that sticker pissed me off for a variety of reasons and I don't consider myself a liberal. It is people like the driver of that car that are ruining this country. I don't have a problem with the sticker that reads "Question Authority" because I think we should question those in power and hold them accountable. But branding all liberals as liars? That is hurtful, mean spirited and divisive. I immediately wanted to confront the driver of the vehicle to ask him why he would act in such an offensive manner. I then stopped to reflect on my thoughts. "Anger will not help the situation" I said to myself as I relaxed a bit and refocused on driving. I am not sure what one can do to change this kind of behavior but if we don’t try to bring this country together we will remain polarized.