It’s a very complex and subjective matter, as to where we should draw the line between an organism that should have the right to life and an organism that shouldn’t. We all dogmatically accept that murder is one of the worst crimes you can commit, but the truth is that we’re not exactly sure why. What makes some forms of killing “murder”, and others perfectly acceptable? Crossing the line bad - but where is the line exactly?
If there were a clear cut answer to that, we would all agree on issues like vegetarianism, euthanasia, the death penalty, warfare etc. Nowadays we frown at the idea that British people who colonised Australia considered it legal to kill Aborigines on the basis that they were a different species - but what exactly makes us right and them wrong? Maybe future civilisations will frown at us for farming and killing animals so gratuitously - who knows?
Abortion is an equally blurry issue. I prefer to err on the side of caution and say it’s better not to do it, because that way you know you definitely aren’t doing anything wrong. This is especially given the fact that, if you don’t want to have a child you can easily make sure you don’t conceive one in the first place. I wouldn’t say “abortion is murder”, because that just depends on how you define “murder”, but it certainly isn’t ideal and it’s pretty much unnecessary for someone responsible enough to not risk pregnancy to begin with.
I do however dislike the fact that so many people are in favour of abortion, first and foremost because of their own convenience, and then they define the parameters of “murder” specifically so as to make abortion acceptable.
It’s like shooting a gun at a blank canvas, then painting a bullseye over the bullet hole to make it look like you were on target. This completely the reverse of what it should be. We should do things because we consider them moral, not just start considering them moral because we already do them.