We cannot judge anyone like this that he is using religion for political purposes.On other hand Imran Khan is using Religion in politics in search of political points. No wonder he received death threats from Mullahs due to Islamic mistakes he quote during the Jalsas and media. The guy, who shot, he openly mentioned he followed fatwas of Mullahs and he is proud of doing this.
Nobody should use religion in politics.
There are many so called religious people who themselve are ignorant and intolerant and hence resort to extremism, you will see that any good Muslim Scholar or preacher or even common Muslim will be tolerant toward other people and the mistakes they make because they know that no one is perfect except Allah and humans no matter how much they try will always make mistakes.