@TeamYouTube really gave me an anti-immigration adpic.twitter.com/u9OP8vTPdP
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Thanks for bringing this to our attention. Please report the ad for review using AdWords feedback form: https://goo.gl/UgBa25 . You can also, control the type of ads you see by editing your preferences: https://goo.gl/vVWxiX . Hope this helps.