MURRIETA, California (CNN) -

On a holiday marking the birth of a nation of immigrants, protesters and counterprotesters began a new round of angry demonstrations Friday in a California town that was scheduled to receive new busloads of migrants arrested for entering the country illegally.

The small Southern California city of Murrieta, named after a Spaniard whose family set up a sheep ranch there in 1873, is now a national flashpoint in the U.S. immigration crisis: Protesters are denouncing the federal transfer of detained migrants to their town for processing at a local U.S. Border Patrol office.

Demonstrators successfully blockaded busloads from entering the town earlier this week.

A second convoy of federal buses carrying migrants to a U.S. Border Patrol station in Murrieta was expected Friday, and Murrieta resident Jason Woolley joined protesters to express his outrage about illegal border crossings. A surge of undocumented Central American immigrants has created a federal crisis, and some of them are supposed to be processed in Murrieta.

"There's a right way and a wrong way to come into this country. If you are going to come in the wrong way, we're not going to stand for it. That's just how it is," Woolley said. "There (are) thousands and millions of other people who've done it the right way. But for people to just come in here and ask for a free handout, that's my money."

Erica Suarez of Long Beach defended the immigrants' rights to due process -- and noted how the United States was built by immigrants.

"It's not a us versus we situation. It's a we. It's everybody together," said Suarez, who described herself as an undocumented student.

Police arrested at least one protester Friday morning. No further details were immediately available.

Exchange of hard words

The protests have been emotionally charged, with racial slurs uttered against Latinos defending the rights of the arrested immigrants, some of whom may be refugees, the immigration rights advocates say.

But on Independence Day, protesters held placards saying, "It's not about race. It's about law."

Others said, "No human is illegal," and "No white supremacy."

Police secured the road so the entry to the Border Patrol office was clear, though a smaller group of protesters found a way to camp on the side of the road.

A quarter of a mile away, a yellow police line held back the larger demonstration of dozens of protesters, and by Friday afternoon, police put up a second yellow tape and stood between the two factions of demonstrators to stop their pushing and shoving.

Protesters chanted, "USA! USA!"

Counterprotesters chanted, "La raza unida jamas seran vencida," which translates as "The (Latino) race united will never be defeated."

Apparently supporting them, men and women in Indian costumes trimmed with feathers danced to a drumbeat.

Police warned participants not to fight. Some of them suffered heat exposure in the 100-degree sunshine and found relief under a tent.

"We don't want anyone to get hurt. There's children here," a police officer told protesters.

Both sides waved American flags, but one demonstrator held a shredded U.S. flag, angering an adversary who yelled: "Absolute disgrace!"