Now you are contradicting your thesis that the NFL is rapidly losing popularity. Why would San Diego fans be upset about losing a team unless they are solid interested local fans of the NFL ? You are actually supporting my point that the NFL is a strong league with several other cities, including Toronto, that would want a team. Toronto is a far stronger sports market then San Diego or Charlotte. But we have you and another poster on here pushing your personal politics with the empty threat that your communities will reject the NFL because of the player protests. Good luck with that; as a sports market neither is important.
10 years from now the NFL will still be highly profitable and relevant. The player protests won't cost them any long term interest at all because for every person that rejects the protests there are at least as many people who support the protests.
Toronto is not a stronger sports market then San Diego or Charlotte. There is only one sport in Canada with a hard-core fan base and that is hockey. Other sports are followed by fair weather fans and in many games the seats are half empty. You can easily buy a ticket for a Blue Jay game from a scalper for under $10 and watch baseball in the more than half empty Rogers Centre.
For example, in recent weeks Toronto had two victory celebrations in Nathan Phillips Square (which is right near the office of the company I am working at in downtown). First the Argos (CFL) won the Grey Cup ("the Canadian Football League Superbowl") and the victory celebration was sparsely attended -- coming nowhere near to filling the square. Then a week later the Toronto F.C. won the MLS Cup in soccer and once again the victory celebration was sparsely attended. People generally don't care about sports other than hockey in Canada. Now if the Maple Leafs won the Stanley Cup the entire City of Toronto downtown would be close down.
BTW -- the Carolina Hurricanes were just sold in Raleigh for approx $500 Million and will likely be leaving town. It is hard to complete against college sports (Duke, UNC, etc.) in the Raleigh area. The Carolina Panthers in Charlotte will be sold shortly and will likely leave Charlotte in 2020 when their stadium contract expires. I will note that the Panthers are one of the few NFL teams will a full stadium each week and rising revenue because their current owner refuses to allow players to kneel during the national anthem.