How does it appear that they are playing politics, rather than (say) that Larry Masinter (representing Adobe) is playing politics by claiming that canvas etc. a

How does it appear that they are playing politics, rather than (say) that Larry Masinter (representing Adobe) is playing politics by claiming that canvas etc. are out of scope for the WG? Other participants in the email discussion linked by the parent have said that these things have already been determined to be in scope for the WG. Larry Masinter says otherwise. I have no inside information or expertise and do not propose to try to resolve that dispute :-), but the claims being made by (it seems) everyone other than Larry Masinter seem plausible prima facie.