Let me show you two videos. They both are about activism against the Israeli occupation of Palestine.
This first is documentation of an action by BDS activists against a promotion of Israeli technology at the Boston Museum of Science. They picket outside the museum, & then the group infiltrates the audience at a presentation (becoming half of that audience.) They keep interrupting the presentation, & keep getting booed by the others in the audience, except for one man who says they should speak their mind for five minutes & then let the presentation proceed. All the activists are escorted out one by one by security after standing up.
This other video is about a group of Jewish artists who actually went to Gaza after Rachel Corrie was killed. They decided to establish a mural program where residents of Rafah, Gaza, & Olympia, Washington would make murals together in both their cities.
Both these approaches to activism are legitimate, in my opinion.