Here is the sentence including the word.
おまえさん とこのジョーは自{じ}分{ぶん}の身{み}を守{まも}るがためにわしらの子{こ}どもまでまきぞえにしとるんやで。
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Sign up to join this communityRoughly, 「やで」 is the Kansai equivalent of the Kanto 「だよ」. It is an affirmation sentence-ender.
「しとるんやで」≒「してるんだよ」