Yes it would be nice if our Palestinian neighbours could enjoy the tel aviv beach like we do. However, as long as the minority of Palestinians who wish to carry out terror attacks in Israel are not stamped out by the silent majority, the majority of innocent Palestinians will continue to suffer. The answer to your question of why not every day, is sadly obvious. I think it would take about 10 days before some terrorist managed to sneak his way in and carry out a suicide attack.
Greek police say bust internat'l migrant smuggling ring, arrest 12 (Reuters)
from the article: A day at the beach