Think Not the Yeshua Came to Abolish the Law and the Prophets

Many followers of Yeshua are not followers of his Torah, at lest not all of it. Gratefully, there are only a few categories that get neglected: his feasts (appointed times/mo’edim), foods, and expectations of the future. But, why are those areas neglected? Is that what Yeshua taught? Has all been fulfilled?