“But Britain is the parent country, say some. Then the more shame upon her conduct. Even
brutes do not devour their young, nor savages
make war upon their families ...”

What is Thomas Paine trying to say here?

Britain is the mother country referring to the colonies and the colonies hated them This is why he says "more shame upon her" The "mother" did a poor job raising the kid, they did such a bad job that the "kid" wants to wage war against them, he even says this "Savages don't make war with there families" he's saying Britain is worse than savages because they allowed it to get so bad that the Colonies wanted to split.

Explanation:

the virginia plan called for three branches of government and two houses of congress. representation in each house would be determined by population. the new jersey plan called for three branches of government and a single house of congress. each state would have an equal vote.