The post is critical and frank but well within the bounds of civil discourse. Pleasant and understanding is not always the appropriate tone (though it's a good default). Sometimes people or companies do harmful things. To respond with patience and respect is to normalize them.
If that sentence had been followed by something sarcastic, derogatory, or harmful, then I'd agree. However, since it's followed by "here's an actual problem I'm having that Google could fix", I choose to believe that jacquesm is honestly saying "you've got a lot of bright people there, but AMP is the wrong project to have them spend time on".
