It is sometimes said that karate is not the best martial art for self-defense. Many people prefer Krav Maga and Jiu-Jitsu.
No art is the "best" for self-defense. Too much depends on the individual and the situation.
Some people prefer Krav Maga and Jiu-jitsu. Some people prefer Karate of one form or another. Some people prefer Wing Chun or Judo or Kali or any one of a myriad of arts.
The only folks making a big deal about "my martial art is better than all these others are either instructors engaged in advertising for their product or evangelical partisans who believe they've found the one true way and that they can convince everybody else of that if they just repeat it enough. (Cue Hanzou's arrival in the thread a little further down.)
An incident which occurred in India this year seems to prove otherwise:
A single incident doesn't prove anything about whether an art is good or bad or the best for self-defense. It just indicates that one individual was able to defend themself in one particular situation using whatever they've learned.
Karate is more suited to the street, than the grappling styles. Although, knowing both is a plus.
I'd say it mostly depends on how the karate or grappling art was trained than anything else, although I agree that it's good to understand both striking and grappling.
Fighting/combat sports and self defence are not the same thing (the differences have been discussed elsewhere on this site many times) and that fact that something works (or does not work) in one field does not mean it will (or will not) work in the other. So the lack of effectiveness of [insert name of martial art here] in the UFC has absolutely no bearing on it's effectiveness for self defence.
Yes and no.
As we've discussed before, most of self-defense is not about fighting. However the primary use of any martial art in self-defense is in the subsection of self-defense that involves fighting. If a martial doesn't improve your ability to fight in some context, then it probably is not going to help your self-defense capability much.
The most useful and appropriate tactics and techniques for fighting do vary considerably in different contexts. Two trained unarmed fighters squaring off in a challenge match is not the same as a teenage girl fending off a date rapist is not the same as a group of orderlies trying to subdue a psychiatric patient having a violent psychotic break is not the same as soldiers using bayonets in the trenches of WWI. Nevertheless, there are also commonalities as well and it is possible to gain useful insights from observations in one context that can be applied to another. I would recommend that anyone interested in "street application" of their martial art not dismiss the lessons from MMA any more than they should blindly assume that the best tactics for the cage match those of the street.
The preference for Krav Maga or Bjj is because if the karate practitioner gets tackled or ends up on the ground they're pretty much done for.
Maybe if they are taken down by someone who is an expert in groundfighting. Fortunately for the karateka, the overwhelming majority of self-defense situations don't involve assailants who are expert groundfighters.
Additionally other striking styles (mainly forms of boxing) teaches more effective fighting tactics, like head movement and footwork.
Good karate has good footwork. I'll agree that boxing is best for head movement, however there are other useful elements that can be found in karate but not boxing.
KM, MMA, and Bjj incorporates what works, and actively evolve their respective systems constantly.
True, but evolution (in biology or martial arts) improves fitness within a specific context. You could easily argue that a large percentage of BJJ students are being more poorly prepared for street self-defense than they would have been a generation ago because they are focused on learning how to win BJJ tournaments at the expense of stand-up, takedown, and punch defense skills.
Karate by and large does not, and prefers to adhere to tradition above everything else.
Eh. "Karate" is a huge umbrella and it includes people who are innovating, people dedicated to tradition, and people who think they are innovating or being traditional when they really aren't.