When a 19-year-old college student from Mississippi says "free Palestine" do you take that to mean kill Jews?
Depends what "mean" means
The phrase literally means what Exgingi is saying.
Does every dumb college student knows what they're saying? No.
Do a small percentage of idiots not realize that it's a murderous chant and think it's a freedom chant? Yes
Does that change the meaning? No
Should it bother us if some chant the phrase and don't understand the meaning? Yes, despite their ignorance they are still promoting extremely hateful, vile acts.