1)
Why does it mention that Hashem sent messengers to them?
1.
'Rashi': This justifies His verdict. Do not say that He punished amidst anger, without warning. He warned them every day!
2)
Why does it say that He had mercy on his nation?
1.
'Rashi': He did not desire their death.
3)
What is "Me'ono"?
1.
'Rashi': It is the dwelling of the Beis ha'Mikdash. Even a mortal king has mercy on his nation and dwelling; he does not want them to be destroyed.


