The Ideological Purity of the Tea Party

I don't agree with the Tea Party but I do respect them for getting involved in the political process to try to get their voices heard. What I dislike about the Tea Party is their attempts to impose an ideological purity test in the American political scene where those who disagree are marginalized or kicked out. They've targeted moderate Republicans and even conservative Republicans who are willing to collaborate with Democrats. They've demonized anyone in the left of the political spectrum.