@CoryZapatka, you phoned the wrong "expert." Andrea Dutton is a friend of Michael Mann. She's a scientist, but she's also an activist, with a history of misrepresenting the science. She did not give you balanced information.
The truth is that manmade climate change has had no detectable effect on sea-level trends. That is a basic, measured fact, which she told you.
The rate of sea-level rise has been measured for over a century at many locations, and for as long as two centuries, at some. Those measurements show that sea-level trends have not detectably increased (i.e., sea-level rise has not accelerated) since the 1920s.
That's true almost everywhere -- including New York City, shown here:
Here's an interactive version of the same graph:
On the right-hand side you can see the linear and quadratic regression calculation results, for the last ninety years. The "acceleration" (increase in rate) was –0.0026 ±0.0164 mm/yr². (Notice the minus sign, and notice the fact that the uncertainty range is larger than the central value.)
If you understand what that means, or if you understand graphs, then it should be plain to you that In other words,
If that's not obvious to you from the graph, here's a little primer that should help: