One Nation leader Pauline Hanson has told crowds at an anti-immigration rally she is not opposed to migration but "mass" migration, while insisting her "tune has not changed" on the topic.The comments came after Opposition leader Angus Taylor declared migrants from "bad countries" posed a higher risk to Australia We are proposing discrimination based on acceptance," he said."If someone wants to come here and overturn our democracy or doesn't believe in our system of law, I think most Australians would agree with me, they shouldn't be coming to the country."The comments come after Taylor last week unveiled part of the coalition's immigration policy, which would make compliance with the Australian Values Statement a binding visa condition, establish a "safe country list" to fast-track rejection of protection claims, and introduce enhanced screening of visa applicants, including routine social media checks