Why did the English think that it was reasonable to enforce the Stamp Act?

British Parliament passed the Stamp Act to help replenish their finances after the costly Seven Years' War with France. Part of the revenue from the Stamp Act would be used to maintain several regiments of British soldiers in North America to maintain peace between Native Americans and the colonists

Explanation:

were at first enthusiastic in support of the revolution. however, over time divisions of opinion became apparent between federalists and anti-federalists

it was the first amendment