Just because the government is enforcing laws you don't like does not make it oppression. Imagine if everyone started using firearms in response to laws they considered oppressive, e.g. business owners who found regulation oppressive might say "come and enforce it". You would probably refer to this as "undermining democracy" if it was a law that you actually agreed with.
False equivalence. The scenario with immigration is more like: Someone builds a house on your land. You tell the cops to kick them out. Protesters disrupt the cops, stating: "OMG you'll make them homeless!"