I assume you mean the Treaty of Paris of 1763 which ended the French and Indian War.
Americans felt a new sense of importance and downright ebullience at the conclusion of the war, as they firmly believed that they had fought and won the war on behalf of the Empire. Benjamin Franklin even commented that he foresaw the day when the capital of the Empire would not be on the Thames but on the Hudson. At the same time, there was a growing disdain for the British soldiers who remained in the Americas. The feeling was somewhat mutual, as the lowest British soldier considered himself superior to the highest ranking American officer. At the same time, the cursing, whore-mongering, etc. of the British troops made Americans feel morally superior to them.
The British, although relieved at the end of the war, still considered the Indians to be an issue, as well as the cost of the war. For this reason, the Royal Proclamation of 1763 prohibited settlement East of the crest of the Appalachian Mountains in an attempt to avoid future conflict with the Indians. Parliament also passed a number of acts, notably the Stamp Act, in an effort to have colonists assume at least a portion of the costs of the war. This, together with the continued presence of British soldiers, caused increasing resentment on the part of Americans.
The French were understandably distressed at losing the war. The French King, encouraged French settlers to return to France as soon as possible rather than live under a "Lutheran" (the common catch-all term for Protestant) government. Article XX of the Treaty guaranteed them the right to worship as they pleased, and also provided that all Spanish subjects might leave if they so desired:
His Britannick Majesty agrees, on his side, to grant to the inhabitants of the countries above ceded, the liberty of the Catholick religion; he will, consequently, give the most express and the most effectual orders that his new Roman Catholic subjects may profess the worship of their religion according to the rites of the Romish church, as far as the laws of Great Britain permit. His Britannick Majesty farther agrees, that the Spanish inhabitants, or others who had been subjects of the Catholick King in the said countries, may retire, with all safety and freedom, wherever they think proper; and may sell their estates, provided it be to his Britannick Majesty's subjects, and bring away their effects, as well as their persons without being restrained in their emigration, under any pretence whatsoever, except that of debts, or of criminal prosecutions: the term limited for this emigration being fixed to the space of eighteen months, to be computed from the day of the exchange of the ratifications of the present treaty. It is moreover stipulated, that his Catholick Majesty shall have power to cause all the effects that may belong to him, to be brought away, whether it be artillery or other things.