On Monday's edition of the WJLA's NewsTalk program, Joseph asserted that Trump was leading the GOP presidential race because voters were tired of political correctness.
Hagler, however, argued that political correctness was another phrase for "respecting other people."
"Political incorrectness is racist, it's xenophobic because it really in a sense diminishes people's humanity," Hagler explained. "It characterizes people in negative ways, it stereotypes people in ways that are ultimately destructive."
The pastor contended that the political success of Trump was tied to America's history of racism, and to the way some whites feel threatened by the election of President Barack Obama.
"People basically tried to restore the Confederacy and did so after the compromise," Hagler noted. "And we're really facing this white supremacist paradigm all over again."
Joseph countered that white Americans were "afraid to say what they believe because they know that if they do say what they believe that they will accused of being racist bigots."
"You are failing to admit that there is a paradigm in this country, a historical paradigm that is built upon white supremacy," Hagler interrupted.
But Joseph said that he was more concerned that the Black Lives Matter movement had been wrong about the circumstances of the death of Michael Brown than he was with an "historical pattern."
"You need to wise up and open up your eyes and see that there has been an historical pattern in this country of white supremacist violence against black people!" the pastor exclaimed. "I'm saying you need to sit down with people long enough to know something about them, to know something about what's going on."
Hagler pointed out that he had tried to start a discussion with Joseph before the show over a vulgar tweet the conservative journalist directed at the Black Lives Matter movement.
"Just like we were waiting to go on this show, you don't have the character to even listen long enough," Hagler remarked. "He told the Black Lives movement to basically [F-word] themselves after Paris. It's that type of provocative language."
"My mama and hopefully your mama taught you to be respectful of people," he continued. "And if she taught you to be respectful of people then that is political correctness."
"The last thing the Black Lives Matter movement is doing is being respectful," Joseph opined. "They are saying all cops are bad, they are saying all cops are racist, they are rioting in the streets."
"Because the Black Lives Matter movement is a disgusting anti-American liberal movement," he added. "The way that they've been taking the things that are not facts and telling the country that they are in order to promote their agenda, that is wrong."
Watch the video below from WJLA, broadcast Dec. 28, 2015.
