Final answer:
The assertion that Native Americans uniformly treated English settlers kindly is false; Native Americans were often abused and exploited by settlers.
Step-by-step explanation:
According to the historical record, it is false that Native Americans treated the original English settlers kindly, as suggested by Senator Frelinghuysen.
In fact, from the very beginning of European settlement in North America, Native Americans were often abused and exploited.
The British colonists attempted to enslave Native Americans, especially in the southern colonies.
After the American Revolution, the U.S. government took over the responsibility of conducting negotiations with Indian tribes, but these tribes were denied U.S. citizenship because they were regarded as citizens of other nations, thereby excluding them from the rights and protections afforded to U.S. citizens.