Global Warming/Waterworld Theory

So Kilauea is spewing lava...I understand that magma bust through the earth's crust causing lava flows. Why does lava spew from volcanoes? Volcanic eruptions occur where tectonic plates either split apart or coming smashing together. Most massive volcanic eruptions will cool off the temperature of the planet. For example, Mt Pinatubo reduced global temps by one degree and drastically impacted global precipitation the following year. Now, most of earths ecosystems have a way to balance or correct themselves. Its basic science for action there is an equal and opposite reaction. Maybe these new lava flows from Kilauea are responses to global warming. Maybe the earth is building land so that when we flood the planet there are places for humans to leave.... damn I have been watching too much Waterworld!