There is no right to trespass.
People who are here without authorization yet expect to be left alone simply because they are here are wrong.
It's like a burglar expecting to be left alone just because he got in when you left the door unlocked.
When the door is not unlocked, the charge is not just breaking, but breaking and entering -- the law provides, as you say, for the criminal violation of trespassing.
And some buffoons on TV act all stupid, outraged at our calls that we need to take our country back, "From who?" they decry, (should be whom, genius). From just these types of offenders.