"It may seem arbitrary, but the platform an organization uses is indicative to me of a whole lot."
What is he supposed to add here to avoid condescension? He was asked a question, this belief drives the answer. He admits his opinions might not be fully formed ("seem arbitrary"), and claims no general truth for his opinion ("indicative to me", rather than just indicative). And he's giving his basis for preferring Unix, rather than a vague "I don't like Windows". He's actually not negative about Windows at all!
What is he supposed to add here to avoid condescension? He was asked a question, this belief drives the answer. He admits his opinions might not be fully formed ("seem arbitrary"), and claims no general truth for his opinion ("indicative to me", rather than just indicative). And he's giving his basis for preferring Unix, rather than a vague "I don't like Windows". He's actually not negative about Windows at all!