How do I attribute climate change to tsunamis and earthquakes?
That is an real easy one.

What do we know about stress on plate tec. in relation to stable polar icecaps, glaciers, permafrost ..etc.
Lots...we have been studying data for the last century or two in relation to a stable planet.
And we have rough historical data dating further back.

What do we know about stress on plate tec. in relation to all that fixed stable ice suddenly being melted (I say "suddenly" since the current rate of speed is faster than any natural climate change in the Earths history) and putting more stress on the planet.
Absolutely nothing.

What can be expected from ...in the span of a few decades ...the release of so much frozen fixed mass and weight on the planet?
What can be expected of said fixed weight of the polar icecaps which help to stabilize the "wobble" of our planet when they overnight (in terms of the rate of speed unnaturally occurring) disappear?
What additional stresses on the planet then?
How much? and where? and their effect?

I think the tip of the iceberg is what we are seeing the last few decades, and it will get worse.

I don't like to gamble unless I have a good chance of winning...
Pennies to Pounds I bet good money on the fact that one cannot take so much fixed and stable weighted mass as what is frozen water...on this planet...suddenly melt it ...and expect the planetary stresses not to impact the tectonic plates of the planet, enabling more movement of the plates, enabling more seismic activity, which in turn accounts for more volcanic, quake, and tsunami activity.

If you take a glass of water and fill it...then toss some ice cubes in and top it up...
What happens when the ice cubes melt if the glass is left untouched ?
The ice melts..and the glass overflows...
In planetary terms...additional stress.

There is as direct a connection as is needed between climactic change ,quakes and tsunamis.