Abortion is the cause of hundreds of thousands of deaths, not thousands like gun homicide.
If we consider all abortion as the direct cause of thousands of deaths yes, but there is no universal consensus about it, contrary of death penalty and/deaths by guns. See the nuance.
Practically every single country has stricter gun laws than the US, so it's pretty moot to discuss having tighter restrictions in these countries; They already exist.
Yes, I did forget to mention that the figures were specifically for the US, but let's face it, when we're discussing gun control and abortion as hot button topics we're talking about the US. Practically every other country has already implemented stricter gun laws and either banned or allowed abortion.
Well for a pernickety person correcting me about those "thousands", you are very imprecise and inexact here: The least when you are giving some stats and details is to explain what exactly are they dealing about and which population is concerned.
Also let's face it, abortion is not universally recognized as "killing a person". So let's compare things that are comparable and stay accurate.
It is a theological position in part stemming from the belief that since God created people they are inherently superior to beasts, but for the most part people realize this long before they have any sort of theological convictions. For instance, I personally loved digging up anthills with the aim of killing every single ant inside of them when I was younger, and I was totally okay with this.
Killing anthills is not something condemnable by (at least) the Abrahamic religions, you are mixing religions here, Buddhism and sometimes Hinduism (some sects) are condemning the killing of any living being indeed. Same can't be said about Abrahamic religions (religious animal sacrifices as an example).
Some funny anecdote: I worked in a hotel during one summer, the funny story is that the governess was Buddhist and could not kill any ants nor spiders in rooms while cleaning them because of her religion forbidding it...
Guns actually have practical uses, for example self defense or hunting; They just happen to be good at killing people too. Abortion has no practical uses, and its only aim is to kill humans. This is why it's so easy to accept guns and reject abortion, and it's not inconsistent at all.
Indeed guns have practical uses, as you may have noticed I also said my Grandpa and uncles had rifles in their houses, it is tolerated in France as long as it is for hunting or if you are part of a shooting club.
Abortion has no practical uses? For you on religious grounds certainly there is no practical uses at all, but without abortion and uncontrolled births what would happen? Hundred of thousands of unwanted babies = potential orphans (knowing how the US system is wrecked about orphanages, see Disposable Children or rehoming unwanted children at will), potential children raised without love because unwanted. What about the ones discovering they would have babies that would have a horrible life (congenital deseases which make life unbearable).
And "this is why it's so easy to accept guns and reject abortion": frankly let me doubt about that, guns are not universally accepted in most of the developed nations (excepted the US and few others), whereas abortion is widely accepted in those developed nations (with the exception of very few country, the only country I heard where it is indeed illegal is Ireland for religious reasons, but I heard that many debates started lately about it even there).