Ah. Great question to the OP! I will start by saying this video was shown to me in my Christian days, and this is my answer as well. Pat Condell once again nails it!
In agreeing with what he said, I have 2 comments.
#1. I tend to respect people regardless of beliefs, but when Christianity or religion comes around, I do start becoming very "rude". Now, with that being said, I make sure that they know when I talk about religion, I talk about belief, not the people. For some reason though, theists and religionists think that talking trash about religion is talking about that specific person themselves, and thus makes it hard to discuss with a religious person because they will personally make sure your comments will offend them. That imo, does not deserve respect.
#2. Why do I have such disrespect and hatred for religion? 2 words as 1 example: Blue Laws. That is right, because of somebody else's belief, I can't for example buy beer on Sundays, I can't run for office in the Bible Belt, etc. Because somebody believes in bullshit and because they think differently than I, if I finally get a girlfriend/wife, get her pregnant, and she has complications with the pregnancy where she needs abortion, she can not get it and either we have to travel to another state entirely (or all the way across the country to the north) to get the medical help she needs, or she possibly dies from it, all because some Joe Schmoe who believes in a god that I have no clue exists, dictates that pro-life in the most extreme cases, should be the law and abortion should be illegal, and voted as such. Because of some random elderly fundamentalist Baptist who believes in their religion, if I get sick and need medical attention and have no insurance, I should be left to die because for some reason, Jesus, according to her beliefs, would have been against national healthcare.
These 2 reasons and the video in combination is why when religion is brought up, I don't see a need or a reason to respect it. In fact, it is my viewpoint, nay, my duty as a rational, logical, reasonable, and caring about others kind of people to bash it and hate it to no ends and make sure that those who believe really are mentally ill, especially since I'll be the one suffering for their beliefs. I will admit that even my other non-Christian friends tell me that I take my anti-Christianity to an extreme extent, and I will agree with them, but it is necessary. Far to long have the bullies had their way with giving the communities children hugs and kisses, and being pro-life from conception to birth. The difference between my Death Worship and a Christian's Death Worship is I am honest about it, while they cover theirs in lies, and in my opinion, I view a liar as the worst possible thing you could be. I view a liar as worse than a murderer, so that is why I not only give no respect to religion or Christianity, I bash and hate the shit out of it, and do whatever I can to get people away from this pile of lying shit. Just remember though, I hate the belief, not the people, as the lies have screwed up the people to begin with.