I think you’re missing the point of such distruptive protesting. It’s a reflection of the seriousness of the situation and the lack of progress through more respectful and peaceful means that has lead to this point. They impose themselves on the average person-in-the-street to push the message harder. Yes people don’t like it, but that’s half the point as it gets the attention required. It’s not meant to be nice, it’s not meant to be pretty. Making people angry at the inconvenience is also part of the point as so many people are ignoring the issue in favour of maintaining the comfortable status quo. And it’s this comfortable status quo that is at threat, but people don’t see it or want to admit it. Getting people on side is only any good if they’re sufficiently riled up, so I don’t think they’re really losing anyone through these tactics.