Sen. Ted Cruz, R-Texas, believes the sharp rhetoric coming from Democrats about the government shutdown proves Tea Party Republicans are beginning to achieve changes that threaten the business-as-usual mentality in the nation's capital.

"Why are they screaming so loudly? Why are they getting so personal? Why are they so filled with hate and fear?" Cruz asked during an phone interview with Glenn Beck on his radio show Thursday.

Cruz suggested that it was because the American people were finally mobilizing against Obamacare.

"That has the Left terrified out of their minds," Cruz said.

Cruz said President Obama and Senate Majority Leader Harry Reid wanted to shut down the government because they believed that it would help them politically, and that the mainstream media is supporting their talking points.

Beck noted that one congressional Democrat accused Tea Party Republicans of waging jihad.

"I want to make it very clear, that yes, that's exactly what we're doing," Beck said. "Because we've learned from those same people that jihad is a peaceful inner struggle that is just trying to purify themselves and their community."

"Well, you know, I'm going to leave that one alone," Cruz said, as Beck and his co-hosts chuckled.