You do not ban currency just because of its stupid founders who make idiotic statements. Think about people.
Personally I have never used BSV or followed its story. I do own some due to the forks, but I have never tried to move them.
However, I find the procedure questionable to have a poll whether to delist a coin or not. An exchange should look at the actual demand (and if too low delist). I don't know how much trading volume BSV had, maybe it was too low? Kraken is not known for having many alts...
Apart from that there are probably enough exchanges where you can still trade. If BSV is such a popular coin than exchanges would only hurt themselves if not. But my guess is that most BTC clones are not really that popular and will dissappear soon...