Exactly, we know it is a combination of things which brings problems. But still, he is highlighting there are known problems so I do not understand what point you are trying to push with your comment. He is not saying coffee will cause alone those problems in all cases.

I agree. If you eat Mc Donald's all day, but drink X cups of coffee, it wouldn't make a difference.

A hamburger made at home is no better than McDonald's if you eat them every day too McDonald's is just a restaurant no the Devil.

I disagree. A hamburger you make at home is unlikely to contain the crap that is in a McDonald's burger. If you get actual meat, add a few veggies and a whole wheat bun then a burger can become an excellent meal.

It's even better if you skip the fries.

I'd trust McDonald's buns and meat to contain LESS preservatives and other bizarre compounds than a pack of burger bread and patties that I'd pick up at my local grocery store. The main reason is that McDonald's is a well-oiled supply-chain machine with (probably) low storage durations for the various ingredients, whereas consumer grocery products can suffer weeks on a store shelf before purchase. The second reason (also just speculation) is that the intensity of regulatory agencies' scrutiny of McDonald's ingredients (especially with regard to meat) would dwarf that of the small packages I would be able to buy for a barbeque.

I believe in staying away from foods high in lipids in general, but fast food burgers don't scare me. It's fries and pizzas that I abhor.

I wasn't talking about store bought burgers. They may or may not be as bad as a McDonald's burger. Get the meat, add some spices(and maybe Worcester sauce) and you'll have your own delicious patty. The whole thing takes around 15 mins and you can customize any part of the process.

However, I agree with your point that there are healthier food options out there if you have the choice.

What research are you basing that off of? I've not seen any research on this. It's a valid hypothesis, but said as a statement is blatantly fallacious without research being done.

couldn't you make that point under almost any comment in this thread?

Perhaps, but this was the first blatant statement without any supporting evidence.

You forgot an important factor: Genetics.

Your grandfather and his friends don't have statistical significance to base a conclusion, unless he has thousands of friends who drink coffee and smoke ;)