The one major thing that all believers of ALL faiths have in common is the delusion that their particular flavour of god is real. And they all think theirs is the right one...and they ALL know this for a fact....no matter what religion or belief they hold.
There is no reason why one unproven belief should be respected more than another unproven belief.
And certainly no reason to respect those that kill or terrorise for their belief in an imaginary god.