Why Was Hitler's T4 Plan Mainly Targeted The Mentally Challenged People

Hitler’s T4 plan mainly targeted the physically and mentally challenged people ,but why? Hitler's T4 plan consisted of the practice of euthanasia which literally translates into “good death”.Adolf Hitler authorized his T4 plan somewhere between mid-October 1939 and 1940.It was in the summer of 1939 that Hitler made another decision filled with cruelty, which was that euthanasia was to be applied to adults as well as children. In Hitler’s letter he practically stated that mentally and physically challenged people should be giving mercy by putting them to death.Judging by Hitler's future actions such as the Holocaust , it was clear that he did not have any limits and that his ‘merciful deaths” weren’t merciful at all.People perceive Hitler