I lived in Nigeria and I do not recall death squads now or ever hunting down homosexuals. Homosexuality in Nigeria is actually quite common, even among muslims and it only becomes a problem when a homosexual decides to go against African tradition and refuses to father any offspring i.e. becomes a "western lifestyle homosexual."
If a Nigerian homosexual marries a woman, fathers children and lives a homosexual life, nobody is bothered. (As long as he has done his "duty" and fathered children.)
These death squads may exist in Borno state under Boko Haram's IS style conditions but none of my Nigerian friends still in Nigeria have ever seen or heard about death squads for homosexuals. The British and US governments have both got very legitimate concerns over the training and seriousness of the Nigerian position on Boko Haram and that is one of the major reasons for the withholding of greater training or equipment.
If you look at events on the ground, Boko Haram made a serious mistake in attacking Chad, Cameroon and Niger this year - these states have all had major successes in attacking and defeating Boko Haram and have also been involved in defeating BH in Nigeria. In fact those successes are all notably lacking by the far better armed and larger Nigerian army.
Why? Because of the traidional Nigerian problems of incompetence, corruption and poor training.
Nothing to do with Barack Obama / abortion / homosexuality / rape.
We are seeing is partly the result of this president's failure to leave a force of 15-20,000 in Iraq, as military experts recommended. That would have been a somewhat smaller version, probably differing in some other ways, from the force the U.S. has maintained in South Korea since the Korean War petered out in 1953. The U.S. military has to be based somewhere, and we have been basing much of it there, in Germany, and elsewhere overseas for many years. Iraq had been made peaceful enough that the risk to a powerful residual force, supported by unlimited air power, would have been fairly low. And yet this president, for his personal political gain, used the existence of a status of forces agreement he could certainly have changed, if he had had the will, as an excuse to leave Iraq wide open to what has now happened.
The chaos in Iraq and Syria is also partly the result of six years of Obama's continual appeasement of the mullahs who rule Iran. They see no threat from him, and that has encouraged them not only to extend their influence in Iraq, but also to increase both their support of the Assad regime in Syria and of their proxy force Hizballah in Lebanon. This westward Shiite pressure from Iran encouraged the Sunni jihadists in Syria to fight Assad, and it also encouraged nations across the Persian Gulf from Iran to provide covert aid to these jihadists. Which they have been doing. In order to line up Obama's largely symbolic five-nation Arab "coalition" against the jihadists in Syria and Iraq, the U.S. had to agree that Qatar, et al. would only fly air strikes (such as they were) against ISIS forces, but not against those of al Nusra, or other jihadists they identified as affiliated with al Qaeda.