First connor and jowan destroing castle and village why because they are mages we have deal with that problem.
i. Isolde don't want to send Connor to the Circle because her son will lost his title and everything as the Arl son, she don't want to be separated with his son, and she ashamed because she's RELIGIOUS
ii. Isolde hired an apostate that being suggested by LOGHAIN
Above reasons that lead to Redcliffe problem, in which driven from the existence of the Circle and Chantry propaganda
Second Zathrian and his curse why we have werewolves because mage
Zathrian curse the human bandits that rape the Elf girl, those bandits are not just "bandits" i suspect but that is another matter, Zathrian just living with his vengeance, he cannot forgive and he cannot forget...but the Warden can make him realize his mistake and willingly die to end the curse. Even so, humans are still the same
Third Tower of mages well here i don't have even speak i hope.
The problem don't exist if the tower don't exist
Fourth blight what was probably caused by mages at least it wouldn't happened without mages.
Then those Mages should be hold responsible, not all Mages
All this disasters caused by mages and i skip side quests.
The disasters are the effect of the disease caused by the system itself that run by the Chantry