Could a Comet Hit the Earth and Trigger a Tsunami in the Atlantic?

Currently we have a Comet which has broken up and whose fragments will be flying by Earth. Do not worry no fragments of any large size are expected to hit the Earth so we are safe. But what if a similar scenario in the future occurred and one did? Well sure that could happen and we occasionally here about large asteroids, meteors and Comets passing or whizzing by Mother Earth.

Now then some people are predicting this latest Comet and its fragments to hit Earth? Most people including NASA say