"[These organizations] have to be willing to speak out and make strong statements that vaccines do not cause autism," he said. "These organizations have been conspicuous by their silence."
Meanwhile, the escalating tension has Poland worried about the potential for violence.
"These things, they bother you because the nature of violence is that it's unpredictable," he said. "Does it take a personal injury, a death or property damage before something is done?"
Kirk Fernandes and Audrey Grayson contributed to this report.