As you are being particularly obtuse this morning I will spell it out to you. My links demonstrate that the Irish government, like many others, has commissioned studies to determine the risk posed by changing weather patterns to coastal/estuarine infrastructure. As a result of these continuously updated studies certain schemes have already been started to reduce flooding risk. Skibbereen is the only one of which I have firsthand knowledge. Even to you it must be obvious that settlements are first in line for protective works. Trump having invested an initial 8.7million euros to buy his golf course obviously does not want a storm to destroy his investment. The purchase occurred in 2014 and the initial planning applications not much later. Trump, like any other astute business man wishes to protect his investment. You are again allowing emotion to over ride commonsense. It is not a new seawall at all. It is a scheme that has been around for several years. It is not even controversial elsewhere!
St Andrews Golf club had to carry out emergency dune repairs after a blowout. The dunes were badly damaged back in March 2010 by high tides and strong North Easterly gales and a substantial amount of sand was lost.
Taking your nimby attitude of tree hugging nonsense to the ultimate absurdity everything would be fossilised and sterilized and allowed to revert to "nature" You can banquet on a view if you wish, I prefer to banquet on a steak and accept the landscape modification that allows this. This is the same reasoning that accepts that motorways are essential, as are new houses and fields preserved in order to grow food. I doubt there were sackfulls of little nimbies creating mayhem when all those fields adjacent to the golf course were created

Dunes are ephemeral and vulnerable features of the landscape. They are also dynamic. If you wish to prevent the dynamics impacting the operation of an adjacent golf course steps need to be taken. Had it been any other person requesting these remedial works I doubt it would have made headlines anywhere else.

As you are retired on a British pension I doubt you have the least concern for the employment opportunities put at risk by your resistance to the scheme.